331811128 has 32 divisors (see below), whose sum is σ = 680400000. Its totient is φ = 150446560.

The previous prime is 331811107. The next prime is 331811141. The reversal of 331811128 is 821118133.

It is a super-2 number, since 2×331811128² = 220197249329264768, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 331811096 and 331811105.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 32373 + ... + 41371.

It is an arithmetic number, because the mean of its divisors is an integer number (21262500).

Almost surely, 2^331811128 is an apocalyptic number.

It is an amenable number.

331811128 is an abundant number, since it is smaller than the sum of its proper divisors (348588872).

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

331811128 is a wasteful number, since it uses less digits than its factorization.

331811128 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9435 (or 9431 counting only the distinct ones).

The product of its digits is 1152, while the sum is 28.

The square root of 331811128 is about 18215.6835721309. The cubic root of 331811128 is about 692.3042254388.

The spelling of 331811128 in words is "three hundred thirty-one million, eight hundred eleven thousand, one hundred twenty-eight".