331644216 has 16 divisors (see below), whose sum is σ = 829110600. Its totient is φ = 110548064.

The previous prime is 331644193. The next prime is 331644217. The reversal of 331644216 is 612446133.

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (331644217) 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, 6909231 + ... + 6909278.

Almost surely, 2^331644216 is an apocalyptic number.

It is an amenable number.

331644216 is an abundant number, since it is smaller than the sum of its proper divisors (497466384).

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

331644216 is a wasteful number, since it uses less digits than its factorization.

331644216 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13818518 (or 13818514 counting only the distinct ones).

The product of its digits is 10368, while the sum is 30.

The square root of 331644216 is about 18211.1014493907. The cubic root of 331644216 is about 692.1881219748.

The spelling of 331644216 in words is "three hundred thirty-one million, six hundred forty-four thousand, two hundred sixteen".