22165237 has 2 divisors, whose sum is σ = 22165238. Its totient is φ = 22165236.

The previous prime is 22165211. The next prime is 22165249. The reversal of 22165237 is 73256122.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 21659716 + 505521 = 4654^2 + 711^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-22165237 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (22165337) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 11082618 + 11082619.

It is an arithmetic number, because the mean of its divisors is an integer number (11082619).

Almost surely, 2^22165237 is an apocalyptic number.

It is an amenable number.

22165237 is a deficient number, since it is larger than the sum of its proper divisors (1).

22165237 is an equidigital number, since it uses as much as digits as its factorization.

22165237 is an evil number, because the sum of its binary digits is even.

The product of its digits is 5040, while the sum is 28.

The square root of 22165237 is about 4707.9971325395. The cubic root of 22165237 is about 280.9037000679.

The spelling of 22165237 in words is "twenty-two million, one hundred sixty-five thousand, two hundred thirty-seven".