331665325 has 12 divisors (see below), whose sum is σ = 435457620. Its totient is φ = 249724160.

The previous prime is 331665293. The next prime is 331665329. The reversal of 331665325 is 523566133.

It can be written as a sum of positive squares in 6 ways, for example, as 4272489 + 327392836 = 2067^2 + 18094^2 .

It is not a de Polignac number, because 331665325 - 2⁵ = 331665293 is a prime.

It is a super-2 number, since 2×331665325² = 220003775614711250, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (331665329) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 389770 + ... + 390619.

It is an arithmetic number, because the mean of its divisors is an integer number (36288135).

Almost surely, 2^331665325 is an apocalyptic number.

It is an amenable number.

331665325 is a deficient number, since it is larger than the sum of its proper divisors (103792295).

331665325 is a wasteful number, since it uses less digits than its factorization.

331665325 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 780416 (or 780411 counting only the distinct ones).

The product of its digits is 48600, while the sum is 34.

The square root of 331665325 is about 18211.6810042346. The cubic root of 331665325 is about 692.2028074805.

The spelling of 331665325 in words is "three hundred thirty-one million, six hundred sixty-five thousand, three hundred twenty-five".