331081992 has 80 divisors (see below), whose sum is σ = 976179600. Its totient is φ = 104548320.

The previous prime is 331081979. The next prime is 331082051. The reversal of 331081992 is 299180133.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is an unprimeable number.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 1134 + ... + 25757.

It is an arithmetic number, because the mean of its divisors is an integer number (12202245).

Almost surely, 2^331081992 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 331081992, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (488089800).

331081992 is an abundant number, since it is smaller than the sum of its proper divisors (645097608).

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

331081992 is a wasteful number, since it uses less digits than its factorization.

331081992 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 26928 (or 26915 counting only the distinct ones).

The product of its (nonzero) digits is 11664, while the sum is 36.

The square root of 331081992 is about 18195.6586030844. The cubic root of 331081992 is about 691.7967538807.

The spelling of 331081992 in words is "three hundred thirty-one million, eighty-one thousand, nine hundred ninety-two".