131565131 has 2 divisors, whose sum is σ = 131565132. Its totient is φ = 131565130.

The previous prime is 131565127. The next prime is 131565143.

131565131 is nontrivially palindromic in base 10.

It is a weak prime.

It is a palprime.

It is a cyclic number.

It is not a de Polignac number, because 131565131 - 2² = 131565127 is a prime.

It is a super-2 number, since 2×131565131² = 34618767390094322, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 131565131.

It is not a weakly prime, because it can be changed into another prime (131565121) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 65782565 + 65782566.

It is an arithmetic number, because the mean of its divisors is an integer number (65782566).

Almost surely, 2^131565131 is an apocalyptic number.

131565131 is a deficient number, since it is larger than the sum of its proper divisors (1).

131565131 is an equidigital number, since it uses as much as digits as its factorization.

131565131 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1350, while the sum is 26.

The square root of 131565131 is about 11470.1844361806. The cubic root of 131565131 is about 508.6045809430.

The spelling of 131565131 in words is "one hundred thirty-one million, five hundred sixty-five thousand, one hundred thirty-one".