131086215 has 64 divisors (see below), whose sum is σ = 253572480. Its totient is φ = 63866880.

The previous prime is 131086213. The next prime is 131086229. The reversal of 131086215 is 512680131.

131086215 is a `hidden beast` number, since 1 + 31 + 0 + 8 + 621 + 5 = 666.

It is not a de Polignac number, because 131086215 - 2¹ = 131086213 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (131086211) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 197985 + ... + 198645.

It is an arithmetic number, because the mean of its divisors is an integer number (3962070).

Almost surely, 2^131086215 is an apocalyptic number.

131086215 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

131086215 is a deficient number, since it is larger than the sum of its proper divisors (122486265).

131086215 is a wasteful number, since it uses less digits than its factorization.

131086215 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 801 (or 795 counting only the distinct ones).

The product of its (nonzero) digits is 1440, while the sum is 27.

The square root of 131086215 is about 11449.2888425439. The cubic root of 131086215 is about 507.9866993335.

The spelling of 131086215 in words is "one hundred thirty-one million, eighty-six thousand, two hundred fifteen".