22225040 has 20 divisors (see below), whose sum is σ = 51673404. Its totient is φ = 8889984.

The previous prime is 22225037. The next prime is 22225043. The reversal of 22225040 is 4052222.

It is an interprime number because it is at equal distance from previous prime (22225037) and next prime (22225043).

It can be written as a sum of positive squares in 2 ways, for example, as 15085456 + 7139584 = 3884^2 + 2672^2 .

It is a tau number, because it is divible by the number of its divisors (20).

It is not an unprimeable number, because it can be changed into a prime (22225043) 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, 138827 + ... + 138986.

Almost surely, 2^22225040 is an apocalyptic number.

22225040 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

22225040 is an abundant number, since it is smaller than the sum of its proper divisors (29448364).

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

22225040 is a wasteful number, since it uses less digits than its factorization.

22225040 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 277826 (or 277820 counting only the distinct ones).

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

The square root of 22225040 is about 4714.3440689029. The cubic root of 22225040 is about 281.1561042941.

Adding to 22225040 its reverse (4052222), we get a palindrome (26277262).

The spelling of 22225040 in words is "twenty-two million, two hundred twenty-five thousand, forty".