31000000052 has 12 divisors (see below), whose sum is σ = 62000000160. Its totient is φ = 13285714296.

The previous prime is 31000000027. The next prime is 31000000067. The reversal of 31000000052 is 25000000013.

31000000052 is an admirable number.

It is a super-2 number, since 2×31000000052² (a number of 22 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 553571402 + ... + 553571457.

It is an arithmetic number, because the mean of its divisors is an integer number (5166666680).

Almost surely, 2^31000000052 is an apocalyptic number.

It is an amenable number.

31000000052 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

31000000052 is a wasteful number, since it uses less digits than its factorization.

31000000052 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1107142870 (or 1107142868 counting only the distinct ones).

The product of its (nonzero) digits is 30, while the sum is 11.

Adding to 31000000052 its reverse (25000000013), we get a palindrome (56000000065).

The spelling of 31000000052 in words is "thirty-one billion, fifty-two", and thus it is an aban number and an uban number.