22021233 has 16 divisors (see below), whose sum is σ = 31704960. Its totient is φ = 13515264.

The previous prime is 22021229. The next prime is 22021249. The reversal of 22021233 is 33212022.

It is not a de Polignac number, because 22021233 - 2² = 22021229 is a prime.

It is not an unprimeable number, because it can be changed into a prime (22021283) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 25828 + ... + 26666.

It is an arithmetic number, because the mean of its divisors is an integer number (1981560).

Almost surely, 2^22021233 is an apocalyptic number.

It is an amenable number.

22021233 is a deficient number, since it is larger than the sum of its proper divisors (9683727).

22021233 is a wasteful number, since it uses less digits than its factorization.

22021233 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1528.

The product of its (nonzero) digits is 144, while the sum is 15.

The square root of 22021233 is about 4692.6786593586. The cubic root of 22021233 is about 280.2940490820.

Adding to 22021233 its reverse (33212022), we get a palindrome (55233255).

The spelling of 22021233 in words is "twenty-two million, twenty-one thousand, two hundred thirty-three".