131051531 has 16 divisors (see below), whose sum is σ = 150796800. Its totient is φ = 112879008.

The previous prime is 131051527. The next prime is 131051561. The reversal of 131051531 is 135150131.

It is a cyclic number.

It is not a de Polignac number, because 131051531 - 2² = 131051527 is a prime.

It is a super-2 number, since 2×131051531² = 34349007554887922, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (131051561) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 12590 + ... + 20508.

It is an arithmetic number, because the mean of its divisors is an integer number (9424800).

Almost surely, 2^131051531 is an apocalyptic number.

131051531 is a deficient number, since it is larger than the sum of its proper divisors (19745269).

131051531 is a wasteful number, since it uses less digits than its factorization.

131051531 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8018.

The product of its (nonzero) digits is 225, while the sum is 20.

The square root of 131051531 is about 11447.7740631094. The cubic root of 131051531 is about 507.9418927792.

The spelling of 131051531 in words is "one hundred thirty-one million, fifty-one thousand, five hundred thirty-one".