331666223 has 12 divisors (see below), whose sum is σ = 400050000. Its totient is φ = 269320896.

The previous prime is 331666219. The next prime is 331666249. The reversal of 331666223 is 322666133.

It is not a de Polignac number, because 331666223 - 2² = 331666219 is a prime.

It is a super-2 number, since 2×331666223² = 220004966958171458, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 331666223.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (331666213) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 63098 + ... + 68151.

It is an arithmetic number, because the mean of its divisors is an integer number (33337500).

Almost surely, 2^331666223 is an apocalyptic number.

331666223 is a deficient number, since it is larger than the sum of its proper divisors (68383777).

331666223 is a wasteful number, since it uses less digits than its factorization.

331666223 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 131294 (or 131275 counting only the distinct ones).

The product of its digits is 23328, while the sum is 32.

The square root of 331666223 is about 18211.7056587240. The cubic root of 331666223 is about 692.2034322041.

The spelling of 331666223 in words is "three hundred thirty-one million, six hundred sixty-six thousand, two hundred twenty-three".