12931522 has 8 divisors (see below), whose sum is σ = 19615500. Its totient is φ = 6393024.

The previous prime is 12931493. The next prime is 12931549. The reversal of 12931522 is 22513921.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 11909401 + 1022121 = 3451^2 + 1011^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a super-2 number, since 2×12931522² = 334448522472968, which contains 22 as substring.

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, 36147 + ... + 36502.

Almost surely, 2^12931522 is an apocalyptic number.

12931522 is a deficient number, since it is larger than the sum of its proper divisors (6683978).

12931522 is an equidigital number, since it uses as much as digits as its factorization.

12931522 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 72740.

The product of its digits is 1080, while the sum is 25.

The square root of 12931522 is about 3596.0425470230. The cubic root of 12931522 is about 234.7198835309.

The spelling of 12931522 in words is "twelve million, nine hundred thirty-one thousand, five hundred twenty-two".