131557685 has 8 divisors (see below), whose sum is σ = 180422016. Its totient is φ = 90210960.

The previous prime is 131557639. The next prime is 131557687. The reversal of 131557685 is 586755131.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 131557685 - 2⁸ = 131557429 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (131557687) by changing a digit.

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, 1879361 + ... + 1879430.

It is an arithmetic number, because the mean of its divisors is an integer number (22552752).

Almost surely, 2^131557685 is an apocalyptic number.

It is an amenable number.

131557685 is a deficient number, since it is larger than the sum of its proper divisors (48864331).

131557685 is an equidigital number, since it uses as much as digits as its factorization.

131557685 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3758803.

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

The square root of 131557685 is about 11469.8598509310. The cubic root of 131557685 is about 508.5949858445.

The spelling of 131557685 in words is "one hundred thirty-one million, five hundred fifty-seven thousand, six hundred eighty-five".