22165605 has 48 divisors (see below), whose sum is σ = 47908224. Its totient is φ = 9210240.

The previous prime is 22165601. The next prime is 22165613. The reversal of 22165605 is 50656122.

22165605 is a `hidden beast` number, since 2 + 2 + 1 + 656 + 0 + 5 = 666.

It is not a de Polignac number, because 22165605 - 2² = 22165601 is a prime.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (22165601) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 267 + ... + 6663.

It is an arithmetic number, because the mean of its divisors is an integer number (998088).

Almost surely, 2^22165605 is an apocalyptic number.

It is an amenable number.

22165605 is an abundant number, since it is smaller than the sum of its proper divisors (25742619).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

22165605 is a wasteful number, since it uses less digits than its factorization.

22165605 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6426 (or 6423 counting only the distinct ones).

The product of its (nonzero) digits is 3600, while the sum is 27.

The square root of 22165605 is about 4708.0362148140. The cubic root of 22165605 is about 280.9052546342.

It can be divided in two parts, 2216560 and 5, that added together give a triangular number (2216565 = T₂₁₀₅).

The spelling of 22165605 in words is "twenty-two million, one hundred sixty-five thousand, six hundred five".