331685457 has 4 divisors (see below), whose sum is σ = 442247280. Its totient is φ = 221123636.

The previous prime is 331685447. The next prime is 331685491. The reversal of 331685457 is 754586133.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 331685457 - 2¹⁵ = 331652689 is a prime.

It is a super-2 number, since 2×331685457² = 220030484770597698, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (331685437) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 55280907 + ... + 55280912.

It is an arithmetic number, because the mean of its divisors is an integer number (110561820).

Almost surely, 2^331685457 is an apocalyptic number.

It is an amenable number.

331685457 is a deficient number, since it is larger than the sum of its proper divisors (110561823).

331685457 is a wasteful number, since it uses less digits than its factorization.

331685457 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 110561822.

The product of its digits is 302400, while the sum is 42.

The square root of 331685457 is about 18212.2337180259. The cubic root of 331685457 is about 692.2168127079.

The spelling of 331685457 in words is "three hundred thirty-one million, six hundred eighty-five thousand, four hundred fifty-seven".