331665632 has 48 divisors (see below), whose sum is σ = 673307712. Its totient is φ = 160704000.

The previous prime is 331665619. The next prime is 331665643. The reversal of 331665632 is 236566133.

It is a super-2 number, since 2×331665632² = 220004182899918848, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 331665592 and 331665601.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 441257 + ... + 442007.

It is an arithmetic number, because the mean of its divisors is an integer number (14027244).

Almost surely, 2^331665632 is an apocalyptic number.

331665632 is a gapful number since it is divisible by the number (32) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 331665632, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (336653856).

331665632 is an abundant number, since it is smaller than the sum of its proper divisors (341642080).

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

331665632 is a wasteful number, since it uses less digits than its factorization.

331665632 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1171 (or 1163 counting only the distinct ones).

The product of its digits is 58320, while the sum is 35.

The square root of 331665632 is about 18211.6894328890. The cubic root of 331665632 is about 692.2030210554.

The spelling of 331665632 in words is "three hundred thirty-one million, six hundred sixty-five thousand, six hundred thirty-two".