22551161 has 2 divisors, whose sum is σ = 22551162. Its totient is φ = 22551160.

The previous prime is 22551149. The next prime is 22551203. The reversal of 22551161 is 16115522.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 15555136 + 6996025 = 3944^2 + 2645^2 .

It is a cyclic number.

It is not a de Polignac number, because 22551161 - 2⁶ = 22551097 is a prime.

It is not a weakly prime, because it can be changed into another prime (22551101) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 11275580 + 11275581.

It is an arithmetic number, because the mean of its divisors is an integer number (11275581).

Almost surely, 2^22551161 is an apocalyptic number.

It is an amenable number.

22551161 is a deficient number, since it is larger than the sum of its proper divisors (1).

22551161 is an equidigital number, since it uses as much as digits as its factorization.

22551161 is an evil number, because the sum of its binary digits is even.

The product of its digits is 600, while the sum is 23.

The square root of 22551161 is about 4748.8062710538. The cubic root of 22551161 is about 282.5246215520.

Adding to 22551161 its reverse (16115522), we get a palindrome (38666683).

The spelling of 22551161 in words is "twenty-two million, five hundred fifty-one thousand, one hundred sixty-one".