331791982 has 4 divisors (see below), whose sum is σ = 497687976. Its totient is φ = 165895990.

The previous prime is 331791961. The next prime is 331791983. The reversal of 331791982 is 289197133.

It is a semiprime because it is the product of two primes.

It is a super-2 number, since 2×331791982² = 220171838638976648, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (331791983) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 82947994 + ... + 82947997.

It is an arithmetic number, because the mean of its divisors is an integer number (124421994).

Almost surely, 2^331791982 is an apocalyptic number.

331791982 is a deficient number, since it is larger than the sum of its proper divisors (165895994).

331791982 is a wasteful number, since it uses less digits than its factorization.

331791982 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 165895993.

The product of its digits is 81648, while the sum is 43.

The square root of 331791982 is about 18215.1580284114. The cubic root of 331791982 is about 692.2909095185.

The spelling of 331791982 in words is "three hundred thirty-one million, seven hundred ninety-one thousand, nine hundred eighty-two".