131551938 has 48 divisors (see below), whose sum is σ = 337821120. Its totient is φ = 37585296.

The previous prime is 131551907. The next prime is 131551949. The reversal of 131551938 is 839155131.

131551938 is a `hidden beast` number, since 13 + 1 + 551 + 93 + 8 = 666.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 15933 + ... + 22736.

It is an arithmetic number, because the mean of its divisors is an integer number (7037940).

Almost surely, 2^131551938 is an apocalyptic number.

131551938 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

131551938 is an abundant number, since it is smaller than the sum of its proper divisors (206269182).

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

131551938 is an equidigital number, since it uses as much as digits as its factorization.

131551938 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 38693 (or 38681 counting only the distinct ones).

The product of its digits is 16200, while the sum is 36.

The square root of 131551938 is about 11469.6093220301. The cubic root of 131551938 is about 508.5875798716.

The spelling of 131551938 in words is "one hundred thirty-one million, five hundred fifty-one thousand, nine hundred thirty-eight".