331665132 has 12 divisors (see below), whose sum is σ = 773885336. Its totient is φ = 110555040.

The previous prime is 331665109. The next prime is 331665133. The reversal of 331665132 is 231566133.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (12).

It is a super-2 number, since 2×331665132² = 220003519569154848, 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 331665132.

It is not an unprimeable number, because it can be changed into a prime (331665133) 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, 13819369 + ... + 13819392.

Almost surely, 2^331665132 is an apocalyptic number.

It is an amenable number.

331665132 is an abundant number, since it is smaller than the sum of its proper divisors (442220204).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

331665132 is a wasteful number, since it uses less digits than its factorization.

331665132 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 27638768 (or 27638766 counting only the distinct ones).

The product of its digits is 9720, while the sum is 30.

The square root of 331665132 is about 18211.6757054369. The cubic root of 331665132 is about 692.2026732134.

The spelling of 331665132 in words is "three hundred thirty-one million, six hundred sixty-five thousand, one hundred thirty-two".