131551685 has 32 divisors (see below), whose sum is σ = 168739200. Its totient is φ = 98300160.

The previous prime is 131551681. The next prime is 131551733. The reversal of 131551685 is 586155131.

It is not a de Polignac number, because 131551685 - 2² = 131551681 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (131551681) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 946346 + ... + 946484.

It is an arithmetic number, because the mean of its divisors is an integer number (5273100).

Almost surely, 2^131551685 is an apocalyptic number.

It is an amenable number.

131551685 is a deficient number, since it is larger than the sum of its proper divisors (37187515).

131551685 is a wasteful number, since it uses less digits than its factorization.

131551685 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 341.

The product of its digits is 18000, while the sum is 35.

The square root of 131551685 is about 11469.5982928784. The cubic root of 131551685 is about 508.5872538338.

The spelling of 131551685 in words is "one hundred thirty-one million, five hundred fifty-one thousand, six hundred eighty-five".