331555616 has 48 divisors (see below), whose sum is σ = 754427520. Its totient is φ = 140490240.

The previous prime is 331555613. The next prime is 331555639. The reversal of 331555616 is 616555133.

It is a happy number.

It is a super-2 number, since 2×331555616² = 219858253002278912, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (331555613) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 11621 + ... + 28251.

It is an arithmetic number, because the mean of its divisors is an integer number (15717240).

Almost surely, 2^331555616 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 331555616, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (377213760).

331555616 is an abundant number, since it is smaller than the sum of its proper divisors (422871904).

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

331555616 is a wasteful number, since it uses less digits than its factorization.

331555616 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16737 (or 16729 counting only the distinct ones).

The product of its digits is 40500, while the sum is 35.

The square root of 331555616 is about 18208.6687047681. The cubic root of 331555616 is about 692.1264762645.

The spelling of 331555616 in words is "three hundred thirty-one million, five hundred fifty-five thousand, six hundred sixteen".