331424257 has 2 divisors, whose sum is σ = 331424258. Its totient is φ = 331424256.

The previous prime is 331424221. The next prime is 331424311. The reversal of 331424257 is 752424133.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 288966001 + 42458256 = 16999^2 + 6516^2 .

It is a cyclic number.

It is not a de Polignac number, because 331424257 - 2¹⁹ = 330899969 is a prime.

It is not a weakly prime, because it can be changed into another prime (331424857) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 165712128 + 165712129.

It is an arithmetic number, because the mean of its divisors is an integer number (165712129).

Almost surely, 2^331424257 is an apocalyptic number.

It is an amenable number.

331424257 is a deficient number, since it is larger than the sum of its proper divisors (1).

331424257 is an equidigital number, since it uses as much as digits as its factorization.

331424257 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 20160, while the sum is 31.

The square root of 331424257 is about 18205.0613017369. The cubic root of 331424257 is about 692.0350596747.

The spelling of 331424257 in words is "three hundred thirty-one million, four hundred twenty-four thousand, two hundred fifty-seven".