22573242 has 24 divisors (see below), whose sum is σ = 50721216. Its totient is φ = 7524252.

The previous prime is 22573241. The next prime is 22573249. The reversal of 22573242 is 24237522.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is not an unprimeable number, because it can be changed into a prime (22573241) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 22738 + ... + 23709.

It is an arithmetic number, because the mean of its divisors is an integer number (2113384).

Almost surely, 2^22573242 is an apocalyptic number.

22573242 is an abundant number, since it is smaller than the sum of its proper divisors (28147974).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

22573242 is an equidigital number, since it uses as much as digits as its factorization.

22573242 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 46464 (or 46452 counting only the distinct ones).

The product of its digits is 6720, while the sum is 27.

The square root of 22573242 is about 4751.1306022883. The cubic root of 22573242 is about 282.6168029280.

Subtracting from 22573242 its product of digits (6720), we obtain a palindrome (22566522).

The spelling of 22573242 in words is "twenty-two million, five hundred seventy-three thousand, two hundred forty-two".