22332521 has 4 divisors (see below), whose sum is σ = 22372752. Its totient is φ = 22292292.

The previous prime is 22332481. The next prime is 22332533. The reversal of 22332521 is 12523322.

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 a de Polignac number, because none of the positive numbers 2^k-22332521 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 22332493 and 22332502.

It is not an unprimeable number, because it can be changed into a prime (22332551) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 19271 + ... + 20396.

It is an arithmetic number, because the mean of its divisors is an integer number (5593188).

Almost surely, 2^22332521 is an apocalyptic number.

It is an amenable number.

22332521 is a deficient number, since it is larger than the sum of its proper divisors (40231).

22332521 is an equidigital number, since it uses as much as digits as its factorization.

22332521 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 40230.

The product of its digits is 720, while the sum is 20.

The square root of 22332521 is about 4725.7296791078. The cubic root of 22332521 is about 281.6086022642.

Adding to 22332521 its reverse (12523322), we get a palindrome (34855843).

The spelling of 22332521 in words is "twenty-two million, three hundred thirty-two thousand, five hundred twenty-one".