331081990 has 16 divisors (see below), whose sum is σ = 607192848. Its totient is φ = 129933856.

The previous prime is 331081979. The next prime is 331082051. The reversal of 331081990 is 99180133.

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, 311812 + ... + 312871.

It is an arithmetic number, because the mean of its divisors is an integer number (37949553).

Almost surely, 2^331081990 is an apocalyptic number.

331081990 is a deficient number, since it is larger than the sum of its proper divisors (276110858).

331081990 is a wasteful number, since it uses less digits than its factorization.

331081990 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 624743.

The product of its (nonzero) digits is 5832, while the sum is 34.

The square root of 331081990 is about 18195.6585481263. The cubic root of 331081990 is about 691.7967524877.

The spelling of 331081990 in words is "three hundred thirty-one million, eighty-one thousand, nine hundred ninety".