22125555 has 20 divisors (see below), whose sum is σ = 39662832. Its totient is φ = 11800080.

The previous prime is 22125541. The next prime is 22125589. The reversal of 22125555 is 55552122.

It is not a de Polignac number, because 22125555 - 2¹⁵ = 22092787 is a prime.

It is a hoax number, since the sum of its digits (27) coincides with the sum of the digits of its distinct prime factors.

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

It is an unprimeable number.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 26911 + ... + 27720.

Almost surely, 2^22125555 is an apocalyptic number.

22125555 is a deficient number, since it is larger than the sum of its proper divisors (17537277).

22125555 is an equidigital number, since it uses as much as digits as its factorization.

22125555 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 54648 (or 54639 counting only the distinct ones).

The product of its digits is 5000, while the sum is 27.

The square root of 22125555 is about 4703.7809260211. The cubic root of 22125555 is about 280.7359677576.

Adding to 22125555 its reverse (55552122), we get a palindrome (77677677).

The spelling of 22125555 in words is "twenty-two million, one hundred twenty-five thousand, five hundred fifty-five".