321397279492 has 24 divisors (see below), whose sum is σ = 563961767040. Its totient is φ = 160265917440.

The previous prime is 321397279477. The next prime is 321397279493. The reversal of 321397279492 is 294972793123.

It is a super-2 number, since 2×321397279492² (a number of 24 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (321397279493) 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, 2203609 + ... + 2344927.

It is an arithmetic number, because the mean of its divisors is an integer number (23498406960).

Almost surely, 2^321397279492 is an apocalyptic number.

It is an amenable number.

321397279492 is a deficient number, since it is larger than the sum of its proper divisors (242564487548).

321397279492 is a wasteful number, since it uses less digits than its factorization.

321397279492 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 142851 (or 142849 counting only the distinct ones).

The product of its digits is 10287648, while the sum is 58.

The spelling of 321397279492 in words is "three hundred twenty-one billion, three hundred ninety-seven million, two hundred seventy-nine thousand, four hundred ninety-two".