31145252 has 12 divisors (see below), whose sum is σ = 55161456. Its totient is φ = 15384840.

The previous prime is 31145227. The next prime is 31145293. The reversal of 31145252 is 25254113.

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, 46574 + ... + 47237.

It is an arithmetic number, because the mean of its divisors is an integer number (4596788).

Almost surely, 2^31145252 is an apocalyptic number.

It is an amenable number.

31145252 is a deficient number, since it is larger than the sum of its proper divisors (24016204).

31145252 is a wasteful number, since it uses less digits than its factorization.

31145252 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 93898 (or 93896 counting only the distinct ones).

The product of its digits is 1200, while the sum is 23.

The square root of 31145252 is about 5580.7931335967. The cubic root of 31145252 is about 314.6279372958.

Adding to 31145252 its reverse (25254113), we get a palindrome (56399365).

The spelling of 31145252 in words is "thirty-one million, one hundred forty-five thousand, two hundred fifty-two".