332131991 has 2 divisors, whose sum is σ = 332131992. Its totient is φ = 332131990.

The previous prime is 332131979. The next prime is 332131993. The reversal of 332131991 is 199131233.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 332131991 - 2⁶ = 332131927 is a prime.

It is a super-2 number, since 2×332131991² = 220623318891248162, which contains 22 as substring.

It is a Sophie Germain prime.

Together with 332131993, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (332131993) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 166065995 + 166065996.

It is an arithmetic number, because the mean of its divisors is an integer number (166065996).

Almost surely, 2^332131991 is an apocalyptic number.

332131991 is a deficient number, since it is larger than the sum of its proper divisors (1).

332131991 is an equidigital number, since it uses as much as digits as its factorization.

332131991 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 4374, while the sum is 32.

The square root of 332131991 is about 18224.4887719793. The cubic root of 332131991 is about 692.5273074158.

The spelling of 332131991 in words is "three hundred thirty-two million, one hundred thirty-one thousand, nine hundred ninety-one".