131377531 has 2 divisors, whose sum is σ = 131377532. Its totient is φ = 131377530.

The previous prime is 131377523. The next prime is 131377567. The reversal of 131377531 is 135773131.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 131377531 - 2³ = 131377523 is a prime.

It is a super-2 number, since 2×131377531² = 34520111303311922, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 131377493 and 131377502.

It is not a weakly prime, because it can be changed into another prime (131377501) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 65688765 + 65688766.

It is an arithmetic number, because the mean of its divisors is an integer number (65688766).

Almost surely, 2^131377531 is an apocalyptic number.

131377531 is a deficient number, since it is larger than the sum of its proper divisors (1).

131377531 is an equidigital number, since it uses as much as digits as its factorization.

131377531 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 6615, while the sum is 31.

The square root of 131377531 is about 11462.0037951486. The cubic root of 131377531 is about 508.3627245450.

The spelling of 131377531 in words is "one hundred thirty-one million, three hundred seventy-seven thousand, five hundred thirty-one".