331330231 has 2 divisors, whose sum is σ = 331330232. Its totient is φ = 331330230.

The previous prime is 331330199. The next prime is 331330247. The reversal of 331330231 is 132033133.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 331330231 - 2⁵ = 331330199 is a prime.

It is a super-2 number, since 2×331330231² = 219559443949026722, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 331330199 and 331330208.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (331330331) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 165665115 + 165665116.

It is an arithmetic number, because the mean of its divisors is an integer number (165665116).

Almost surely, 2^331330231 is an apocalyptic number.

331330231 is a deficient number, since it is larger than the sum of its proper divisors (1).

331330231 is an equidigital number, since it uses as much as digits as its factorization.

331330231 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 486, while the sum is 19.

The square root of 331330231 is about 18202.4787048358. The cubic root of 331330231 is about 691.9696093829.

Adding to 331330231 its reverse (132033133), we get a palindrome (463363364).

The spelling of 331330231 in words is "three hundred thirty-one million, three hundred thirty thousand, two hundred thirty-one".