311421668 has 6 divisors (see below), whose sum is σ = 544987926. Its totient is φ = 155710832.

The previous prime is 311421631. The next prime is 311421673. The reversal of 311421668 is 866124113.

It can be written as a sum of positive squares in only one way, i.e., 311099044 + 322624 = 17638^2 + 568^2 .

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 38927705 + ... + 38927712.

It is an arithmetic number, because the mean of its divisors is an integer number (90831321).

Almost surely, 2^311421668 is an apocalyptic number.

It is an amenable number.

311421668 is a deficient number, since it is larger than the sum of its proper divisors (233566258).

311421668 is a wasteful number, since it uses less digits than its factorization.

311421668 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 77855421 (or 77855419 counting only the distinct ones).

The product of its digits is 6912, while the sum is 32.

The square root of 311421668 is about 17647.1433382290. The cubic root of 311421668 is about 677.8229597240.

The spelling of 311421668 in words is "three hundred eleven million, four hundred twenty-one thousand, six hundred sixty-eight".