22733521 has 4 divisors (see below), whose sum is σ = 22764544. Its totient is φ = 22702500.

The previous prime is 22733497. The next prime is 22733531. The reversal of 22733521 is 12533722.

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 22733521 - 2⁵ = 22733489 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (22733531) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 14385 + ... + 15886.

It is an arithmetic number, because the mean of its divisors is an integer number (5691136).

Almost surely, 2^22733521 is an apocalyptic number.

It is an amenable number.

22733521 is a deficient number, since it is larger than the sum of its proper divisors (31023).

22733521 is an equidigital number, since it uses as much as digits as its factorization.

22733521 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 31022.

The product of its digits is 2520, while the sum is 25.

The square root of 22733521 is about 4767.9682255653. The cubic root of 22733521 is about 283.2841232490.

The spelling of 22733521 in words is "twenty-two million, seven hundred thirty-three thousand, five hundred twenty-one".