331318899987 has 4 divisors (see below), whose sum is σ = 441758533320. Its totient is φ = 220879266656.

The previous prime is 331318899983. The next prime is 331318900013. The reversal of 331318899987 is 789998813133.

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

It is a cyclic number.

It is not a de Polignac number, because 331318899987 - 2² = 331318899983 is a prime.

It is not an unprimeable number, because it can be changed into a prime (331318899983) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 55219816662 + ... + 55219816667.

It is an arithmetic number, because the mean of its divisors is an integer number (110439633330).

Almost surely, 2^331318899987 is an apocalyptic number.

331318899987 is a deficient number, since it is larger than the sum of its proper divisors (110439633333).

331318899987 is a wasteful number, since it uses less digits than its factorization.

331318899987 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 110439633332.

The product of its digits is 70543872, while the sum is 69.

The spelling of 331318899987 in words is "three hundred thirty-one billion, three hundred eighteen million, eight hundred ninety-nine thousand, nine hundred eighty-seven".