131557122 has 20 divisors (see below), whose sum is σ = 294785766. Its totient is φ = 43852320.

The previous prime is 131557103. The next prime is 131557187. The reversal of 131557122 is 221755131.

It can be written as a sum of positive squares in only one way, i.e., 90839961 + 40717161 = 9531^2 + 6381^2 .

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

It is an unprimeable number.

It is a polite number, since it can be written in 9 ways as a sum of consecutive naturals, for example, 405879 + ... + 406202.

Almost surely, 2^131557122 is an apocalyptic number.

131557122 is an abundant number, since it is smaller than the sum of its proper divisors (163228644).

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

131557122 is an equidigital number, since it uses as much as digits as its factorization.

131557122 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 812095 (or 812086 counting only the distinct ones).

The product of its digits is 2100, while the sum is 27.

The square root of 131557122 is about 11469.8353083207. The cubic root of 131557122 is about 508.5942603342.

The spelling of 131557122 in words is "one hundred thirty-one million, five hundred fifty-seven thousand, one hundred twenty-two".