321322690 has 16 divisors (see below), whose sum is σ = 622871928. Its totient is φ = 118642176.

The previous prime is 321322681. The next prime is 321322693. The reversal of 321322690 is 96223123.

It can be written as a sum of positive squares in 4 ways, for example, as 296631729 + 24690961 = 17223^2 + 4969^2 .

It is a super-2 number, since 2×321322690² = 206496542217672200, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (321322693) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1235727 + ... + 1235986.

Almost surely, 2^321322690 is an apocalyptic number.

321322690 is a deficient number, since it is larger than the sum of its proper divisors (301549238).

321322690 is a wasteful number, since it uses less digits than its factorization.

321322690 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2471733.

The product of its (nonzero) digits is 3888, while the sum is 28.

The square root of 321322690 is about 17925.4760048374. The cubic root of 321322690 is about 684.9314865675.

The spelling of 321322690 in words is "three hundred twenty-one million, three hundred twenty-two thousand, six hundred ninety".