321397223 has 12 divisors (see below), whose sum is σ = 395863632. Its totient is φ = 259277760.

The previous prime is 321397213. The next prime is 321397259. The reversal of 321397223 is 322793123.

It is not a de Polignac number, because 321397223 - 2⁸ = 321396967 is a prime.

It is a super-2 number, since 2×321397223² = 206592349904223458, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 321397223.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (321397213) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 192083 + ... + 193748.

It is an arithmetic number, because the mean of its divisors is an integer number (32988636).

Almost surely, 2^321397223 is an apocalyptic number.

321397223 is a deficient number, since it is larger than the sum of its proper divisors (74466409).

321397223 is a wasteful number, since it uses less digits than its factorization.

321397223 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 385862 (or 385855 counting only the distinct ones).

The product of its digits is 13608, while the sum is 32.

The square root of 321397223 is about 17927.5548527957. The cubic root of 321397223 is about 684.9844406575.

The spelling of 321397223 in words is "three hundred twenty-one million, three hundred ninety-seven thousand, two hundred twenty-three".