331130249 has 2 divisors, whose sum is σ = 331130250. Its totient is φ = 331130248.

The previous prime is 331130221. The next prime is 331130257. The reversal of 331130249 is 942031133.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 274399225 + 56731024 = 16565^2 + 7532^2 .

It is a cyclic number.

It is not a de Polignac number, because 331130249 - 2²⁴ = 314353033 is a prime.

It is a Sophie Germain prime.

It is a Chen prime.

It is a Curzon number.

It is not a weakly prime, because it can be changed into another prime (331130209) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 165565124 + 165565125.

It is an arithmetic number, because the mean of its divisors is an integer number (165565125).

Almost surely, 2^331130249 is an apocalyptic number.

It is an amenable number.

331130249 is a deficient number, since it is larger than the sum of its proper divisors (1).

331130249 is an equidigital number, since it uses as much as digits as its factorization.

331130249 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1944, while the sum is 26.

The square root of 331130249 is about 18196.9846128418. The cubic root of 331130249 is about 691.8303632936.

The spelling of 331130249 in words is "three hundred thirty-one million, one hundred thirty thousand, two hundred forty-nine".