31235523021252 has 72 divisors (see below), whose sum is σ = 87594224870880. Its totient is φ = 9304881016320.

The previous prime is 31235523021223. The next prime is 31235523021253. The reversal of 31235523021252 is 25212032553213.

31235523021252 is a `hidden beast` number, since 3 + 1 + 2 + 3 + 5 + 523 + 0 + 2 + 125 + 2 = 666.

It is a super-2 number, since 2×31235523021252² (a number of 28 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is not an unprimeable number, because it can be changed into a prime (31235523021253) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 668430733 + ... + 668477460.

It is an arithmetic number, because the mean of its divisors is an integer number (1216586456540).

Almost surely, 2^{31235523021252} is an apocalyptic number.

It is an amenable number.

31235523021252 is an abundant number, since it is smaller than the sum of its proper divisors (56358701849628).

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

31235523021252 is a wasteful number, since it uses less digits than its factorization.

31235523021252 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1336908273 (or 1336908268 counting only the distinct ones).

The product of its (nonzero) digits is 108000, while the sum is 36.

Adding to 31235523021252 its reverse (25212032553213), we get a palindrome (56447555574465).

The spelling of 31235523021252 in words is "thirty-one trillion, two hundred thirty-five billion, five hundred twenty-three million, twenty-one thousand, two hundred fifty-two".