31551130252 has 12 divisors (see below), whose sum is σ = 55308544200. Its totient is φ = 15748689056.

The previous prime is 31551130231. The next prime is 31551130271. The reversal of 31551130252 is 25203115513.

It is a self number, because there is not a number n which added to its sum of digits gives 31551130252.

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, 6716377 + ... + 6721072.

It is an arithmetic number, because the mean of its divisors is an integer number (4609045350).

Almost surely, 2^31551130252 is an apocalyptic number.

It is an amenable number.

31551130252 is a deficient number, since it is larger than the sum of its proper divisors (23757413948).

31551130252 is a wasteful number, since it uses less digits than its factorization.

31551130252 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13438040 (or 13438038 counting only the distinct ones).

The product of its (nonzero) digits is 4500, while the sum is 28.

Adding to 31551130252 its reverse (25203115513), we get a palindrome (56754245765).

The spelling of 31551130252 in words is "thirty-one billion, five hundred fifty-one million, one hundred thirty thousand, two hundred fifty-two".