131396522 has 4 divisors (see below), whose sum is σ = 197094786. Its totient is φ = 65698260.

The previous prime is 131396483. The next prime is 131396549. The reversal of 131396522 is 225693131.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 225693131 = 149 ⋅1514719.

It can be written as a sum of positive squares in only one way, i.e., 129982801 + 1413721 = 11401^2 + 1189^2 .

It is an unprimeable number.

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 as a sum of consecutive naturals, namely, 32849129 + ... + 32849132.

Almost surely, 2^131396522 is an apocalyptic number.

131396522 is a deficient number, since it is larger than the sum of its proper divisors (65698264).

131396522 is an equidigital number, since it uses as much as digits as its factorization.

131396522 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 65698263.

The product of its digits is 9720, while the sum is 32.

The square root of 131396522 is about 11462.8321980216. The cubic root of 131396522 is about 508.3872184629.

The spelling of 131396522 in words is "one hundred thirty-one million, three hundred ninety-six thousand, five hundred twenty-two".