22404555 has 24 divisors (see below), whose sum is σ = 41120352. Its totient is φ = 11245824.

The previous prime is 22404541. The next prime is 22404619. The reversal of 22404555 is 55540422.

It is not a de Polignac number, because 22404555 - 2⁴ = 22404539 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 13879 + ... + 15408.

It is an arithmetic number, because the mean of its divisors is an integer number (1713348).

Almost surely, 2^22404555 is an apocalyptic number.

22404555 is a deficient number, since it is larger than the sum of its proper divisors (18715797).

22404555 is a wasteful number, since it uses less digits than its factorization.

22404555 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 29315 (or 29312 counting only the distinct ones).

The product of its (nonzero) digits is 8000, while the sum is 27.

The square root of 22404555 is about 4733.3450117227. The cubic root of 22404555 is about 281.9110553958.

Adding to 22404555 its reverse (55540422), we get a palindrome (77944977).

The spelling of 22404555 in words is "twenty-two million, four hundred four thousand, five hundred fifty-five".