331996655 has 8 divisors (see below), whose sum is σ = 421831152. Its totient is φ = 249973888.

The previous prime is 331996619. The next prime is 331996661. The reversal of 331996655 is 556699133.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-331996655 is a prime.

It is a super-2 number, since 2×331996655² = 220443557862378050, which contains 22 as substring.

It is a Duffinian number.

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, 1952837 + ... + 1953006.

It is an arithmetic number, because the mean of its divisors is an integer number (52728894).

Almost surely, 2^331996655 is an apocalyptic number.

331996655 is a deficient number, since it is larger than the sum of its proper divisors (89834497).

331996655 is a wasteful number, since it uses less digits than its factorization.

331996655 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3905865.

The product of its digits is 656100, while the sum is 47.

The square root of 331996655 is about 18220.7753676950. The cubic root of 331996655 is about 692.4332317560.

The spelling of 331996655 in words is "three hundred thirty-one million, nine hundred ninety-six thousand, six hundred fifty-five".