31242056 has 24 divisors (see below), whose sum is σ = 62231970. Its totient is φ = 14701056.

The previous prime is 31242049. The next prime is 31242067. The reversal of 31242056 is 65024213.

It can be written as a sum of positive squares in 3 ways, for example, as 31024900 + 217156 = 5570^2 + 466^2 .

It is a hoax number, since the sum of its digits (23) coincides with the sum of the digits of its distinct prime factors.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 4445 + ... + 9068.

Almost surely, 2^31242056 is an apocalyptic number.

It is an amenable number.

31242056 is a deficient number, since it is larger than the sum of its proper divisors (30989914).

31242056 is a wasteful number, since it uses less digits than its factorization.

31242056 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13553 (or 13532 counting only the distinct ones).

The product of its (nonzero) digits is 1440, while the sum is 23.

The square root of 31242056 is about 5589.4593656274. The cubic root of 31242056 is about 314.9535700443.

Adding to 31242056 its reverse (65024213), we get a palindrome (96266269).

The spelling of 31242056 in words is "thirty-one million, two hundred forty-two thousand, fifty-six".