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2031202220 = 2251923277839
BaseRepresentation
bin111100100010001…
…1010111110101100
312020120001202121212
41321010122332230
513124441432340
6533315413552
7101222635235
oct17104327654
95216052555
102031202220
11952619323
124882b42b8
13264a80608
14153a9c08c
15bd4c7a65
hex7911afac

2031202220 has 96 divisors (see below), whose sum is σ = 4707763200. Its totient is φ = 732720384.

The previous prime is 2031202193. The next prime is 2031202231. The reversal of 2031202220 is 222021302.

It is a junction number, because it is equal to n+sod(n) for n = 2031202195 and 2031202204.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 2420561 + ... + 2421399.

It is an arithmetic number, because the mean of its divisors is an integer number (49039200).

Almost surely, 22031202220 is an apocalyptic number.

2031202220 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 2031202220, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2353881600).

2031202220 is an abundant number, since it is smaller than the sum of its proper divisors (2676560980).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

2031202220 is a wasteful number, since it uses less digits than its factorization.

2031202220 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1167 (or 1165 counting only the distinct ones).

The product of its (nonzero) digits is 96, while the sum is 14.

The square root of 2031202220 is about 45068.8608686752. The cubic root of 2031202220 is about 1266.4393246961.

Adding to 2031202220 its reverse (222021302), we get a palindrome (2253223522).

The spelling of 2031202220 in words is "two billion, thirty-one million, two hundred two thousand, two hundred twenty".

Divisors: 1 2 4 5 10 19 20 23 38 46 76 92 95 115 190 230 277 380 437 460 554 839 874 1108 1385 1678 1748 2185 2770 3356 4195 4370 5263 5540 6371 8390 8740 10526 12742 15941 16780 19297 21052 25484 26315 31855 31882 38594 52630 63710 63764 77188 79705 96485 105260 121049 127420 159410 192970 232403 242098 318820 366643 385940 464806 484196 605245 733286 929612 1162015 1210490 1466572 1833215 2324030 2420980 3666430 4415657 4648060 5345269 7332860 8831314 10690538 17662628 21381076 22078285 26726345 44156570 53452690 88313140 101560111 106905380 203120222 406240444 507800555 1015601110 2031202220