3131221668 has 24 divisors (see below), whose sum is σ = 7309357440. Its totient is φ = 1043287200.

The previous prime is 3131221637. The next prime is 3131221673. The reversal of 3131221668 is 8661221313.

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, 27283 + ... + 83706.

It is an arithmetic number, because the mean of its divisors is an integer number (304556560).

Almost surely, 2^3131221668 is an apocalyptic number.

It is an amenable number.

3131221668 is an abundant number, since it is smaller than the sum of its proper divisors (4178135772).

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

3131221668 is a wasteful number, since it uses less digits than its factorization.

3131221668 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 113347 (or 113345 counting only the distinct ones).

The product of its digits is 10368, while the sum is 33.

The square root of 3131221668 is about 55957.3200573437. The cubic root of 3131221668 is about 1462.9784801853.

The spelling of 3131221668 in words is "three billion, one hundred thirty-one million, two hundred twenty-one thousand, six hundred sixty-eight".