131885397 has 24 divisors (see below), whose sum is σ = 223030080. Its totient is φ = 73523520.

The previous prime is 131885387. The next prime is 131885437. The reversal of 131885397 is 793588131.

131885397 is a `hidden beast` number, since 1 + 31 + 88 + 539 + 7 = 666.

It is not a de Polignac number, because 131885397 - 2⁸ = 131885141 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (131885357) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 22947 + ... + 28112.

It is an arithmetic number, because the mean of its divisors is an integer number (9292920).

Almost surely, 2^131885397 is an apocalyptic number.

It is an amenable number.

131885397 is a deficient number, since it is larger than the sum of its proper divisors (91144683).

131885397 is a wasteful number, since it uses less digits than its factorization.

131885397 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 51113 (or 51110 counting only the distinct ones).

The product of its digits is 181440, while the sum is 45.

The square root of 131885397 is about 11484.1367546716. The cubic root of 131885397 is about 509.0169413706.

The spelling of 131885397 in words is "one hundred thirty-one million, eight hundred eighty-five thousand, three hundred ninety-seven".