22205505 has 32 divisors (see below), whose sum is σ = 41174784. Its totient is φ = 10008576.

The previous prime is 22205497. The next prime is 22205527. The reversal of 22205505 is 50550222.

It is not a de Polignac number, because 22205505 - 2³ = 22205497 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (21).

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 6217 + ... + 9113.

It is an arithmetic number, because the mean of its divisors is an integer number (1286712).

Almost surely, 2^22205505 is an apocalyptic number.

It is an amenable number.

22205505 is a deficient number, since it is larger than the sum of its proper divisors (18969279).

22205505 is a wasteful number, since it uses less digits than its factorization.

22205505 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2985.

The product of its (nonzero) digits is 1000, while the sum is 21.

The square root of 22205505 is about 4712.2717451352. The cubic root of 22205505 is about 281.0737048251.

Adding to 22205505 its reverse (50550222), we get a palindrome (72755727).

The spelling of 22205505 in words is "twenty-two million, two hundred five thousand, five hundred five".