22864321 has 4 divisors (see below), whose sum is σ = 22898772. Its totient is φ = 22829872.

The previous prime is 22864319. The next prime is 22864349. The reversal of 22864321 is 12346822.

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

It can be written as a sum of positive squares in 2 ways, for example, as 19678096 + 3186225 = 4436^2 + 1785^2 .

It is a cyclic number.

It is not a de Polignac number, because 22864321 - 2¹ = 22864319 is a prime.

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 22864321.

It is not an unprimeable number, because it can be changed into a prime (22864021) 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, 16210 + ... + 17563.

It is an arithmetic number, because the mean of its divisors is an integer number (5724693).

Almost surely, 2^22864321 is an apocalyptic number.

It is an amenable number.

22864321 is a deficient number, since it is larger than the sum of its proper divisors (34451).

22864321 is an equidigital number, since it uses as much as digits as its factorization.

22864321 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 34450.

The product of its digits is 4608, while the sum is 28.

The square root of 22864321 is about 4781.6650865572. The cubic root of 22864321 is about 283.8263874762.

The spelling of 22864321 in words is "twenty-two million, eight hundred sixty-four thousand, three hundred twenty-one".