22524521 has 4 divisors (see below), whose sum is σ = 23503872. Its totient is φ = 21545172.

The previous prime is 22524511. The next prime is 22524547. The reversal of 22524521 is 12542522.

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 22524521 - 2¹⁴ = 22508137 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (23), and also a Moran number because the ratio is a prime number: 979327 = 22524521 / (2 + 2 + 5 + 2 + 4 + 5 + 2 + 1).

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (22524511) 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, 489641 + ... + 489686.

It is an arithmetic number, because the mean of its divisors is an integer number (5875968).

Almost surely, 2^22524521 is an apocalyptic number.

It is an amenable number.

22524521 is a deficient number, since it is larger than the sum of its proper divisors (979351).

22524521 is an equidigital number, since it uses as much as digits as its factorization.

22524521 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 979350.

The product of its digits is 1600, while the sum is 23.

The square root of 22524521 is about 4746.0005267593. Note that the first 3 decimals coincide. The cubic root of 22524521 is about 282.4133276285.

The spelling of 22524521 in words is "twenty-two million, five hundred twenty-four thousand, five hundred twenty-one".