22422500 has 30 divisors (see below), whose sum is σ = 49038990. Its totient is φ = 8968000.

The previous prime is 22422487. The next prime is 22422503. The reversal of 22422500 is 522422.

It can be written as a sum of positive squares in 5 ways, for example, as 8479744 + 13942756 = 2912^2 + 3734^2 .

It is not an unprimeable number, because it can be changed into a prime (22422503) by changing a digit.

It is a polite number, since it can be written in 9 ways as a sum of consecutive naturals, for example, 1985 + ... + 6984.

It is an arithmetic number, because the mean of its divisors is an integer number (1634633).

Almost surely, 2^22422500 is an apocalyptic number.

22422500 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

22422500 is an abundant number, since it is smaller than the sum of its proper divisors (26616490).

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

22422500 is an equidigital number, since it uses as much as digits as its factorization.

22422500 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8993 (or 8976 counting only the distinct ones).

The product of its (nonzero) digits is 320, while the sum is 17.

The square root of 22422500 is about 4735.2402262187. The cubic root of 22422500 is about 281.9863011638.

Adding to 22422500 its reverse (522422), we get a palindrome (22944922).

It can be divided in two parts, 22422 and 500, that added together give a palindrome (22922).

The spelling of 22422500 in words is "twenty-two million, four hundred twenty-two thousand, five hundred".