131557740 has 24 divisors (see below), whose sum is σ = 368361840. Its totient is φ = 35082048.

The previous prime is 131557733. The next prime is 131557759. The reversal of 131557740 is 47755131.

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 in 7 ways as a sum of consecutive naturals, for example, 1096255 + ... + 1096374.

It is an arithmetic number, because the mean of its divisors is an integer number (15348410).

Almost surely, 2^131557740 is an apocalyptic number.

131557740 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

131557740 is an abundant number, since it is smaller than the sum of its proper divisors (236804100).

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

131557740 is a wasteful number, since it uses less digits than its factorization.

131557740 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2192641 (or 2192639 counting only the distinct ones).

The product of its (nonzero) digits is 14700, while the sum is 33.

The square root of 131557740 is about 11469.8622485189. The cubic root of 131557740 is about 508.5950567202.

The spelling of 131557740 in words is "one hundred thirty-one million, five hundred fifty-seven thousand, seven hundred forty".