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21313110 = 23571337211
BaseRepresentation
bin101000101001…
…1011001010110
31111002211002110
41101103121112
520424004420
62040451450
7346105230
oct121233126
944084073
1021313110
1111037945
127179b86
134553010
142b8b250
151d0eee0
hex1453656

21313110 has 128 divisors (see below), whose sum is σ = 64963584. Its totient is φ = 4354560.

The previous prime is 21313093. The next prime is 21313129. The reversal of 21313110 is 1131312.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 100905 + ... + 101115.

It is an arithmetic number, because the mean of its divisors is an integer number (507528).

Almost surely, 221313110 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 21313110, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (32481792).

21313110 is an abundant number, since it is smaller than the sum of its proper divisors (43650474).

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

21313110 is a wasteful number, since it uses less digits than its factorization.

21313110 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 278.

The product of its (nonzero) digits is 18, while the sum is 12.

The square root of 21313110 is about 4616.6123943862. The cubic root of 21313110 is about 277.2568440569.

Adding to 21313110 its reverse (1131312), we get a palindrome (22444422).

The spelling of 21313110 in words is "twenty-one million, three hundred thirteen thousand, one hundred ten".

Divisors: 1 2 3 5 6 7 10 13 14 15 21 26 30 35 37 39 42 65 70 74 78 91 105 111 130 182 185 195 210 211 222 259 273 370 390 422 455 481 518 546 555 633 777 910 962 1055 1110 1266 1295 1365 1443 1477 1554 2110 2405 2590 2730 2743 2886 2954 3165 3367 3885 4431 4810 5486 6330 6734 7215 7385 7770 7807 8229 8862 10101 13715 14430 14770 15614 16458 16835 19201 20202 22155 23421 27430 33670 38402 39035 41145 44310 46842 50505 54649 57603 78070 82290 96005 101010 101491 109298 115206 117105 163947 192010 202982 234210 273245 288015 304473 327894 507455 546490 576030 608946 710437 819735 1014910 1420874 1522365 1639470 2131311 3044730 3552185 4262622 7104370 10656555 21313110