22100605 has 8 divisors (see below), whose sum is σ = 26955864. Its totient is φ = 17390400.

The previous prime is 22100597. The next prime is 22100641. The reversal of 22100605 is 50600122.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 2968729 + 19131876 = 1723^2 + 4374^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 22100605 - 2³ = 22100597 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 35926 + ... + 36535.

It is an arithmetic number, because the mean of its divisors is an integer number (3369483).

Almost surely, 2^22100605 is an apocalyptic number.

It is an amenable number.

22100605 is a deficient number, since it is larger than the sum of its proper divisors (4855259).

22100605 is an equidigital number, since it uses as much as digits as its factorization.

22100605 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 72527.

The product of its (nonzero) digits is 120, while the sum is 16.

The square root of 22100605 is about 4701.1280561159. The cubic root of 22100605 is about 280.6304035977.

Adding to 22100605 its reverse (50600122), we get a palindrome (72700727).

The spelling of 22100605 in words is "twenty-two million, one hundred thousand, six hundred five".