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31013112102 = 2371938863549
BaseRepresentation
bin11100111000100001…
…101000100100100110
32222001100122022220120
4130320201220210212
51002003324041402
622125222342410
72145351050310
oct347041504446
988040568816
1031013112102
1112175103165
12601628aa06
132c0324350b
141702c0a7b0
15c17a4a3bc
hex738868926

31013112102 has 32 divisors (see below), whose sum is σ = 74618016000. Its totient is φ = 8394526368.

The previous prime is 31013112077. The next prime is 31013112113. The reversal of 31013112102 is 20121131013.

It is a happy number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 19430977 + ... + 19432572.

It is an arithmetic number, because the mean of its divisors is an integer number (2331813000).

Almost surely, 231013112102 is an apocalyptic number.

31013112102 is an abundant number, since it is smaller than the sum of its proper divisors (43604903898).

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

31013112102 is a wasteful number, since it uses less digits than its factorization.

31013112102 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 38863580.

The product of its (nonzero) digits is 36, while the sum is 15.

Adding to 31013112102 its reverse (20121131013), we get a palindrome (51134243115).

The spelling of 31013112102 in words is "thirty-one billion, thirteen million, one hundred twelve thousand, one hundred two".

Divisors: 1 2 3 6 7 14 19 21 38 42 57 114 133 266 399 798 38863549 77727098 116590647 233181294 272044843 544089686 738407431 816134529 1476814862 1632269058 2215222293 4430444586 5168852017 10337704034 15506556051 31013112102