321393331 has 4 divisors (see below), whose sum is σ = 367306672. Its totient is φ = 275479992.

The previous prime is 321393299. The next prime is 321393349. The reversal of 321393331 is 133393123.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 321393331 - 2⁵ = 321393299 is a prime.

It is a super-2 number, since 2×321393331² = 206587346422551122, which contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 321393331.

It is not an unprimeable number, because it can be changed into a prime (321393361) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 22956660 + ... + 22956673.

It is an arithmetic number, because the mean of its divisors is an integer number (91826668).

Almost surely, 2^321393331 is an apocalyptic number.

321393331 is a deficient number, since it is larger than the sum of its proper divisors (45913341).

321393331 is an equidigital number, since it uses as much as digits as its factorization.

321393331 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 45913340.

The product of its digits is 4374, while the sum is 28.

The square root of 321393331 is about 17927.4463044796. The cubic root of 321393331 is about 684.9816756780.

The spelling of 321393331 in words is "three hundred twenty-one million, three hundred ninety-three thousand, three hundred thirty-one".