331040231 has 2 divisors, whose sum is σ = 331040232. Its totient is φ = 331040230.

The previous prime is 331040183. The next prime is 331040243. The reversal of 331040231 is 132040133.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-331040231 is a prime.

It is a super-2 number, since 2×331040231² = 219175269081066722, which contains 22 as substring.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (331040291) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 165520115 + 165520116.

It is an arithmetic number, because the mean of its divisors is an integer number (165520116).

Almost surely, 2^331040231 is an apocalyptic number.

331040231 is a deficient number, since it is larger than the sum of its proper divisors (1).

331040231 is an equidigital number, since it uses as much as digits as its factorization.

331040231 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 216, while the sum is 17.

The square root of 331040231 is about 18194.5110129401. The cubic root of 331040231 is about 691.7676660820.

Adding to 331040231 its reverse (132040133), we get a palindrome (463080364).

The spelling of 331040231 in words is "three hundred thirty-one million, forty thousand, two hundred thirty-one".