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55150040 = 235111773101
BaseRepresentation
bin1101001001100…
…0010111011000
310211202220122002
43102120113120
5103104300130
65250020132
71236524201
oct322302730
9124686562
1055150040
1129149050
1216577648
13b56c57a
1474785a8
154c95b45
hex34985d8

55150040 has 128 divisors (see below), whose sum is σ = 146733120. Its totient is φ = 18432000.

The previous prime is 55150033. The next prime is 55150061. The reversal of 55150040 is 4005155.

It is a Harshad number since it is a multiple of its sum of digits (20).

It is a junction number, because it is equal to n+sod(n) for n = 55149994 and 55150021.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 545990 + ... + 546090.

Almost surely, 255150040 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 55150040, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (73366560).

55150040 is an abundant number, since it is smaller than the sum of its proper divisors (91583080).

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

55150040 is a wasteful number, since it uses less digits than its factorization.

55150040 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 213 (or 209 counting only the distinct ones).

The product of its (nonzero) digits is 500, while the sum is 20.

The square root of 55150040 is about 7426.3072923223. The cubic root of 55150040 is about 380.6407472344.

Adding to 55150040 its reverse (4005155), we get a palindrome (59155195).

The spelling of 55150040 in words is "fifty-five million, one hundred fifty thousand, forty".

Divisors: 1 2 4 5 8 10 11 17 20 22 34 40 44 55 68 73 85 88 101 110 136 146 170 187 202 220 292 340 365 374 404 440 505 584 680 730 748 803 808 935 1010 1111 1241 1460 1496 1606 1717 1870 2020 2222 2482 2920 3212 3434 3740 4015 4040 4444 4964 5555 6205 6424 6868 7373 7480 8030 8585 8888 9928 11110 12410 13651 13736 14746 16060 17170 18887 22220 24820 27302 29492 32120 34340 36865 37774 44440 49640 54604 58984 68255 68680 73730 75548 81103 94435 109208 125341 136510 147460 151096 162206 188870 250682 273020 294920 324412 377740 405515 501364 546040 626705 648824 755480 811030 1002728 1253410 1378751 1622060 2506820 2757502 3244120 5013640 5515004 6893755 11030008 13787510 27575020 55150040