331103231 has 2 divisors, whose sum is σ = 331103232. Its totient is φ = 331103230.

The previous prime is 331103209. The next prime is 331103233. The reversal of 331103231 is 132301133.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-331103231 is a prime.

It is a super-2 number, since 2×331103231² = 219258699157278722, which contains 22 as substring.

It is a Sophie Germain prime.

Together with 331103233, 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 (331103233) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 165551615 + 165551616.

It is an arithmetic number, because the mean of its divisors is an integer number (165551616).

Almost surely, 2^331103231 is an apocalyptic number.

331103231 is a deficient number, since it is larger than the sum of its proper divisors (1).

331103231 is an equidigital number, since it uses as much as digits as its factorization.

331103231 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 162, while the sum is 17.

The square root of 331103231 is about 18196.2422219534. The cubic root of 331103231 is about 691.8115465478.

Adding to 331103231 its reverse (132301133), we get a palindrome (463404364).

The spelling of 331103231 in words is "three hundred thirty-one million, one hundred three thousand, two hundred thirty-one".