22291165 has 16 divisors (see below), whose sum is σ = 30503088. Its totient is φ = 15492096.

The previous prime is 22291151. The next prime is 22291177. The reversal of 22291165 is 56119222.

22291165 = 3338² + 3339².

It can be written as a sum of positive squares in 8 ways, for example, as 1397124 + 20894041 = 1182^2 + 4571^2 .

It is a cyclic number.

It is not a de Polignac number, because 22291165 - 2¹³ = 22282973 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 15 ways as a sum of consecutive naturals, for example, 8982 + ... + 11191.

It is an arithmetic number, because the mean of its divisors is an integer number (1906443).

Almost surely, 2^22291165 is an apocalyptic number.

22291165 is the 3339-th centered square number.

It is an amenable number.

22291165 is a deficient number, since it is larger than the sum of its proper divisors (8211923).

22291165 is a wasteful number, since it uses less digits than its factorization.

22291165 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20208.

The product of its digits is 2160, while the sum is 28.

The square root of 22291165 is about 4721.3520309335. The cubic root of 22291165 is about 281.4346645691.

The spelling of 22291165 in words is "twenty-two million, two hundred ninety-one thousand, one hundred sixty-five".