22527161 has 4 divisors (see below), whose sum is σ = 22678500. Its totient is φ = 22375824.

The previous prime is 22527151. The next prime is 22527181. The reversal of 22527161 is 16172522.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 4515625 + 18011536 = 2125^2 + 4244^2 .

It is a cyclic number.

It is not a de Polignac number, because 22527161 - 2¹⁴ = 22510777 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 22527161.

It is not an unprimeable number, because it can be changed into a prime (22527121) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 75446 + ... + 75743.

It is an arithmetic number, because the mean of its divisors is an integer number (5669625).

Almost surely, 2^22527161 is an apocalyptic number.

It is an amenable number.

22527161 is a deficient number, since it is larger than the sum of its proper divisors (151339).

22527161 is a wasteful number, since it uses less digits than its factorization.

22527161 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 151338.

The product of its digits is 1680, while the sum is 26.

The square root of 22527161 is about 4746.2786475301. The cubic root of 22527161 is about 282.4243606719.

Adding to 22527161 its reverse (16172522), we get a palindrome (38699683).

The spelling of 22527161 in words is "twenty-two million, five hundred twenty-seven thousand, one hundred sixty-one".