22320331 has 4 divisors (see below), whose sum is σ = 24349464. Its totient is φ = 20291200.

The previous prime is 22320317. The next prime is 22320391. The reversal of 22320331 is 13302322.

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 22320331 - 2⁵ = 22320299 is a prime.

It is a super-3 number, since 3×22320331³ (a number of 23 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (22320301) 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, 1014550 + ... + 1014571.

It is an arithmetic number, because the mean of its divisors is an integer number (6087366).

Almost surely, 2^22320331 is an apocalyptic number.

22320331 is a deficient number, since it is larger than the sum of its proper divisors (2029133).

22320331 is a wasteful number, since it uses less digits than its factorization.

22320331 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2029132.

The product of its (nonzero) digits is 216, while the sum is 16.

The square root of 22320331 is about 4724.4397551456. The cubic root of 22320331 is about 281.5573551219.

Adding to 22320331 its reverse (13302322), we get a palindrome (35622653).

Subtracting from 22320331 its reverse (13302322), we obtain a square (9018009 = 3003²).

The spelling of 22320331 in words is "twenty-two million, three hundred twenty thousand, three hundred thirty-one".