22490555 has 4 divisors (see below), whose sum is σ = 26988672. Its totient is φ = 17992440.

The previous prime is 22490549. The next prime is 22490563. The reversal of 22490555 is 55509422.

It is a semiprime because it is the product of two primes.

It is not a de Polignac number, because 22490555 - 2⁴ = 22490539 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2249051 + ... + 2249060.

It is an arithmetic number, because the mean of its divisors is an integer number (6747168).

Almost surely, 2^22490555 is an apocalyptic number.

22490555 is a deficient number, since it is larger than the sum of its proper divisors (4498117).

22490555 is an equidigital number, since it uses as much as digits as its factorization.

22490555 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4498116.

The product of its (nonzero) digits is 18000, while the sum is 32.

The square root of 22490555 is about 4742.4207953323. The cubic root of 22490555 is about 282.2713005343.

Adding to 22490555 its reverse (55509422), we get a palindrome (77999977).

The spelling of 22490555 in words is "twenty-two million, four hundred ninety thousand, five hundred fifty-five".