22165442 has 16 divisors (see below), whose sum is σ = 36775032. Its totient is φ = 9953280.

The previous prime is 22165439. The next prime is 22165447. The reversal of 22165442 is 24456122.

It can be written as a sum of positive squares in 4 ways, for example, as 16638241 + 5527201 = 4079^2 + 2351^2 .

It is a Smith number, since the sum of its digits (26) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Harshad number since it is a multiple of its sum of digits (26).

It is not an unprimeable number, because it can be changed into a prime (22165447) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 10559 + ... + 12482.

Almost surely, 2^22165442 is an apocalyptic number.

22165442 is a deficient number, since it is larger than the sum of its proper divisors (14609590).

22165442 is a wasteful number, since it uses less digits than its factorization.

22165442 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 23093.

The product of its digits is 3840, while the sum is 26.

The square root of 22165442 is about 4708.0189039553. The cubic root of 22165442 is about 280.9045660648.

The spelling of 22165442 in words is "twenty-two million, one hundred sixty-five thousand, four hundred forty-two".