331617631 has 2 divisors, whose sum is σ = 331617632. Its totient is φ = 331617630.

The previous prime is 331617617. The next prime is 331617707. The reversal of 331617631 is 136716133.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-331617631 is a prime.

It is a super-2 number, since 2×331617631² = 219940506380104322, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 331617593 and 331617602.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (331617031) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 165808815 + 165808816.

It is an arithmetic number, because the mean of its divisors is an integer number (165808816).

Almost surely, 2^331617631 is an apocalyptic number.

331617631 is a deficient number, since it is larger than the sum of its proper divisors (1).

331617631 is an equidigital number, since it uses as much as digits as its factorization.

331617631 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 6804, while the sum is 31.

The square root of 331617631 is about 18210.3715228438. The cubic root of 331617631 is about 692.1696259359.

The spelling of 331617631 in words is "three hundred thirty-one million, six hundred seventeen thousand, six hundred thirty-one".