331695731 has 2 divisors, whose sum is σ = 331695732. Its totient is φ = 331695730.

The previous prime is 331695697. The next prime is 331695733. The reversal of 331695731 is 137596133.

It is a strong prime.

It is an emirp because it is prime and its reverse (137596133) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-331695731 is a prime.

It is a super-2 number, since 2×331695731² = 220044115927248722, which contains 22 as substring.

Together with 331695733, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (331695733) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 165847865 + 165847866.

It is an arithmetic number, because the mean of its divisors is an integer number (165847866).

Almost surely, 2^331695731 is an apocalyptic number.

331695731 is a deficient number, since it is larger than the sum of its proper divisors (1).

331695731 is an equidigital number, since it uses as much as digits as its factorization.

331695731 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 51030, while the sum is 38.

The square root of 331695731 is about 18212.5157789911. The cubic root of 331695731 is about 692.2239598026.

The spelling of 331695731 in words is "three hundred thirty-one million, six hundred ninety-five thousand, seven hundred thirty-one".