22552161 has 4 divisors (see below), whose sum is σ = 30069552. Its totient is φ = 15034772.

The previous prime is 22552157. The next prime is 22552163. The reversal of 22552161 is 16125522.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 22552161 - 2² = 22552157 is a prime.

It is not an unprimeable number, because it can be changed into a prime (22552163) 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 3 ways as a sum of consecutive naturals, for example, 3758691 + ... + 3758696.

It is an arithmetic number, because the mean of its divisors is an integer number (7517388).

Almost surely, 2^22552161 is an apocalyptic number.

It is an amenable number.

22552161 is a deficient number, since it is larger than the sum of its proper divisors (7517391).

22552161 is an equidigital number, since it uses as much as digits as its factorization.

22552161 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7517390.

The product of its digits is 1200, while the sum is 24.

The square root of 22552161 is about 4748.9115595050. The cubic root of 22552161 is about 282.5287975447.

Adding to 22552161 its reverse (16125522), we get a palindrome (38677683).

The spelling of 22552161 in words is "twenty-two million, five hundred fifty-two thousand, one hundred sixty-one".