131664331 has 2 divisors, whose sum is σ = 131664332. Its totient is φ = 131664330.

The previous prime is 131664283. The next prime is 131664367. The reversal of 131664331 is 133466131.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-131664331 is a prime.

It is a super-2 number, since 2×131664331² = 34670992115355122, 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 131664331.

It is not a weakly prime, because it can be changed into another prime (131634331) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 65832165 + 65832166.

It is an arithmetic number, because the mean of its divisors is an integer number (65832166).

Almost surely, 2^131664331 is an apocalyptic number.

131664331 is a deficient number, since it is larger than the sum of its proper divisors (1).

131664331 is an equidigital number, since it uses as much as digits as its factorization.

131664331 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 3888, while the sum is 28.

The square root of 131664331 is about 11474.5078761575. The cubic root of 131664331 is about 508.7323779732.

The spelling of 131664331 in words is "one hundred thirty-one million, six hundred sixty-four thousand, three hundred thirty-one".