31357042536 has 64 divisors (see below), whose sum is σ = 80250937920. Its totient is φ = 10206443520.

The previous prime is 31357042511. The next prime is 31357042543. The reversal of 31357042536 is 63524075313.

It is a super-2 number, since 2×31357042536² (a number of 22 digits) contains 22 as substring.

It is a hoax number, since the sum of its digits (39) coincides with the sum of the digits of its distinct prime factors.

It is a junction number, because it is equal to n+sod(n) for n = 31357042494 and 31357042503.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 209976 + ... + 326808.

It is an arithmetic number, because the mean of its divisors is an integer number (1253920905).

Almost surely, 2^31357042536 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 31357042536, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (40125468960).

31357042536 is an abundant number, since it is smaller than the sum of its proper divisors (48893895384).

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

31357042536 is a wasteful number, since it uses less digits than its factorization.

31357042536 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 117106 (or 117102 counting only the distinct ones).

The product of its (nonzero) digits is 226800, while the sum is 39.

The spelling of 31357042536 in words is "thirty-one billion, three hundred fifty-seven million, forty-two thousand, five hundred thirty-six".