331661232 has 120 divisors (see below), whose sum is σ = 1068304640. Its totient is φ = 94089600.

The previous prime is 331661191. The next prime is 331661233. The reversal of 331661232 is 232166133.

It is a happy number.

331661232 is a `hidden beast` number, since 3 + 3 + 16 + 612 + 32 = 666.

It is a nude number because it is divisible by every one of its digits.

It is a junction number, because it is equal to n+sod(n) for n = 331661196 and 331661205.

It is not an unprimeable number, because it can be changed into a prime (331661233) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 151119 + ... + 153297.

Almost surely, 2^331661232 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 331661232, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (534152320).

331661232 is an abundant number, since it is smaller than the sum of its proper divisors (736643408).

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

331661232 is a wasteful number, since it uses less digits than its factorization.

331661232 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2351 (or 2342 counting only the distinct ones).

The product of its digits is 3888, while the sum is 27.

The square root of 331661232 is about 18211.5686309554. The cubic root of 331661232 is about 692.1999600340.

The spelling of 331661232 in words is "three hundred thirty-one million, six hundred sixty-one thousand, two hundred thirty-two".