331332257 has 2 divisors, whose sum is σ = 331332258. Its totient is φ = 331332256.

The previous prime is 331332173. The next prime is 331332271. The reversal of 331332257 is 752233133.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 300017041 + 31315216 = 17321^2 + 5596^2 .

It is a cyclic number.

It is not a de Polignac number, because 331332257 - 2¹⁶ = 331266721 is a prime.

It is not a weakly prime, because it can be changed into another prime (331332277) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 165666128 + 165666129.

It is an arithmetic number, because the mean of its divisors is an integer number (165666129).

Almost surely, 2^331332257 is an apocalyptic number.

It is an amenable number.

331332257 is a deficient number, since it is larger than the sum of its proper divisors (1).

331332257 is an equidigital number, since it uses as much as digits as its factorization.

331332257 is an evil number, because the sum of its binary digits is even.

The product of its digits is 11340, while the sum is 29.

The square root of 331332257 is about 18202.5343565120. The cubic root of 331332257 is about 691.9710197861.

The spelling of 331332257 in words is "three hundred thirty-one million, three hundred thirty-two thousand, two hundred fifty-seven".