22315321 has 4 divisors (see below), whose sum is σ = 25503232. Its totient is φ = 19127412.

The previous prime is 22315303. The next prime is 22315327. The reversal of 22315321 is 12351322.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 22315321 - 2⁵ = 22315289 is a prime.

It is a super-3 number, since 3×22315321³ (a number of 23 digits) contains 333 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (22315327) 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, 1593945 + ... + 1593958.

It is an arithmetic number, because the mean of its divisors is an integer number (6375808).

Almost surely, 2^22315321 is an apocalyptic number.

It is an amenable number.

22315321 is a deficient number, since it is larger than the sum of its proper divisors (3187911).

22315321 is an equidigital number, since it uses as much as digits as its factorization.

22315321 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3187910.

The product of its digits is 360, while the sum is 19.

The square root of 22315321 is about 4723.9095037903. The cubic root of 22315321 is about 281.5362875147.

Adding to 22315321 its reverse (12351322), we get a palindrome (34666643).

The spelling of 22315321 in words is "twenty-two million, three hundred fifteen thousand, three hundred twenty-one".