31521524052 has 12 divisors (see below), whose sum is σ = 73550222816. Its totient is φ = 10507174680.

The previous prime is 31521524009. The next prime is 31521524053. The reversal of 31521524052 is 25042512513.

It is a tau number, because it is divible by the number of its divisors (12).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (31521524053) 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 3 ways as a sum of consecutive naturals, for example, 1313396824 + ... + 1313396847.

Almost surely, 2^31521524052 is an apocalyptic number.

It is an amenable number.

31521524052 is an abundant number, since it is smaller than the sum of its proper divisors (42028698764).

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

31521524052 is a wasteful number, since it uses less digits than its factorization.

31521524052 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2626793678 (or 2626793676 counting only the distinct ones).

The product of its (nonzero) digits is 12000, while the sum is 30.

The spelling of 31521524052 in words is "thirty-one billion, five hundred twenty-one million, five hundred twenty-four thousand, fifty-two".