131447831 has 2 divisors, whose sum is σ = 131447832. Its totient is φ = 131447830.

The previous prime is 131447821. The next prime is 131447837. The reversal of 131447831 is 138744131.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 131447831 - 2¹⁸ = 131185687 is a prime.

It is a super-2 number, since 2×131447831² = 34557064549209122, which contains 22 as substring.

It is a Sophie Germain prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (131447837) 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, 65723915 + 65723916.

It is an arithmetic number, because the mean of its divisors is an integer number (65723916).

Almost surely, 2^131447831 is an apocalyptic number.

131447831 is a deficient number, since it is larger than the sum of its proper divisors (1).

131447831 is an equidigital number, since it uses as much as digits as its factorization.

131447831 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 8064, while the sum is 32.

The square root of 131447831 is about 11465.0700390360. The cubic root of 131447831 is about 508.4533831904.

The spelling of 131447831 in words is "one hundred thirty-one million, four hundred forty-seven thousand, eight hundred thirty-one".