331998000 has 80 divisors (see below), whose sum is σ = 1070380896. Its totient is φ = 88531200.

The previous prime is 331997971. The next prime is 331998011. The reversal of 331998000 is 899133.

It is a tau number, because it is divible by the number of its divisors (80).

It is a super-2 number, since 2×331998000² = 220445344008000000, which contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 21667 + ... + 33666.

Almost surely, 2^331998000 is an apocalyptic number.

331998000 is a gapful number since it is divisible by the number (30) formed by its first and last digit.

It is an amenable number.

331998000 is an abundant number, since it is smaller than the sum of its proper divisors (738382896).

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

331998000 is a wasteful number, since it uses less digits than its factorization.

331998000 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 55359 (or 55343 counting only the distinct ones).

The product of its (nonzero) digits is 5832, while the sum is 33.

The square root of 331998000 is about 18220.8122760759. The cubic root of 331998000 is about 692.4341668271.

The spelling of 331998000 in words is "three hundred thirty-one million, nine hundred ninety-eight thousand".