31325021352 has 64 divisors (see below), whose sum is σ = 88865337600. Its totient is φ = 10219507200.

The previous prime is 31325021347. The next prime is 31325021359. The reversal of 31325021352 is 25312052313.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is not an unprimeable number, because it can be changed into a prime (31325021359) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1532649 + ... + 1552952.

It is an arithmetic number, because the mean of its divisors is an integer number (1388520900).

Almost surely, 2^31325021352 is an apocalyptic number.

It is an amenable number.

31325021352 is an abundant number, since it is smaller than the sum of its proper divisors (57540316248).

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

31325021352 is a wasteful number, since it uses less digits than its factorization.

31325021352 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3085663 (or 3085653 counting only the distinct ones).

The product of its (nonzero) digits is 5400, while the sum is 27.

Adding to 31325021352 its reverse (25312052313), we get a palindrome (56637073665).

The spelling of 31325021352 in words is "thirty-one billion, three hundred twenty-five million, twenty-one thousand, three hundred fifty-two".