22506605 has 12 divisors (see below), whose sum is σ = 29687196. Its totient is φ = 16368000.

The previous prime is 22506593. The next prime is 22506607. The reversal of 22506605 is 50660522.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 4008004 + 18498601 = 2002^2 + 4301^2 .

It is not a de Polignac number, because 22506605 - 2⁶ = 22506541 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (22506607) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 17996 + ... + 19205.

It is an arithmetic number, because the mean of its divisors is an integer number (2473933).

Almost surely, 2^22506605 is an apocalyptic number.

It is an amenable number.

22506605 is a deficient number, since it is larger than the sum of its proper divisors (7180591).

22506605 is a wasteful number, since it uses less digits than its factorization.

22506605 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 37228 (or 37217 counting only the distinct ones).

The product of its (nonzero) digits is 3600, while the sum is 26.

The square root of 22506605 is about 4744.1126672962. The cubic root of 22506605 is about 282.3384305971.

The spelling of 22506605 in words is "twenty-two million, five hundred six thousand, six hundred five".