131252331 has 24 divisors (see below), whose sum is σ = 204741264. Its totient is φ = 74571840.

The previous prime is 131252311. The next prime is 131252353. The reversal of 131252331 is 133252131.

It is not a de Polignac number, because 131252331 - 2⁷ = 131252203 is a prime.

It is a super-2 number, since 2×131252331² = 34454348785867122, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (21).

It is a junction number, because it is equal to n+sod(n) for n = 131252298 and 131252307.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (131252311) 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, 24141 + ... + 29073.

It is an arithmetic number, because the mean of its divisors is an integer number (8530886).

Almost surely, 2^131252331 is an apocalyptic number.

131252331 is a deficient number, since it is larger than the sum of its proper divisors (73488933).

131252331 is a wasteful number, since it uses less digits than its factorization.

131252331 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5131 (or 5124 counting only the distinct ones).

The product of its digits is 540, while the sum is 21.

The square root of 131252331 is about 11456.5409701183. The cubic root of 131252331 is about 508.2011869228.

The spelling of 131252331 in words is "one hundred thirty-one million, two hundred fifty-two thousand, three hundred thirty-one".