331609057 has 8 divisors (see below), whose sum is σ = 361639040. Its totient is φ = 302225040.

The previous prime is 331609039. The next prime is 331609067. The reversal of 331609057 is 750906133.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a de Polignac number, because none of the positive numbers 2^k-331609057 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (331609007) 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 7 ways as a sum of consecutive naturals, for example, 160419 + ... + 162472.

It is an arithmetic number, because the mean of its divisors is an integer number (45204880).

Almost surely, 2^331609057 is an apocalyptic number.

It is an amenable number.

331609057 is a deficient number, since it is larger than the sum of its proper divisors (30029983).

331609057 is a wasteful number, since it uses less digits than its factorization.

331609057 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 322983.

The product of its (nonzero) digits is 17010, while the sum is 34.

The square root of 331609057 is about 18210.1361060262. The cubic root of 331609057 is about 692.1636605177.

The spelling of 331609057 in words is "three hundred thirty-one million, six hundred nine thousand, fifty-seven".