131557856 has 12 divisors (see below), whose sum is σ = 259004592. Its totient is φ = 65778912.

The previous prime is 131557847. The next prime is 131557897. The reversal of 131557856 is 658755131.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2055560 + ... + 2055623.

It is an arithmetic number, because the mean of its divisors is an integer number (21583716).

Almost surely, 2^131557856 is an apocalyptic number.

131557856 is a gapful number since it is divisible by the number (16) formed by its first and last digit.

It is an amenable number.

131557856 is a deficient number, since it is larger than the sum of its proper divisors (127446736).

131557856 is an equidigital number, since it uses as much as digits as its factorization.

131557856 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4111193 (or 4111185 counting only the distinct ones).

The product of its digits is 126000, while the sum is 41.

The square root of 131557856 is about 11469.8673052481. The cubic root of 131557856 is about 508.5952062034.

The spelling of 131557856 in words is "one hundred thirty-one million, five hundred fifty-seven thousand, eight hundred fifty-six".