22331161 has 2 divisors, whose sum is σ = 22331162. Its totient is φ = 22331160.

The previous prime is 22331159. The next prime is 22331203. The reversal of 22331161 is 16113322.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 20985561 + 1345600 = 4581^2 + 1160^2 .

It is a cyclic number.

It is not a de Polignac number, because 22331161 - 2¹ = 22331159 is a prime.

Together with 22331159, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (22311161) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 11165580 + 11165581.

It is an arithmetic number, because the mean of its divisors is an integer number (11165581).

Almost surely, 2^22331161 is an apocalyptic number.

It is an amenable number.

22331161 is a deficient number, since it is larger than the sum of its proper divisors (1).

22331161 is an equidigital number, since it uses as much as digits as its factorization.

22331161 is an evil number, because the sum of its binary digits is even.

The product of its digits is 216, while the sum is 19.

The square root of 22331161 is about 4725.5857837944. The cubic root of 22331161 is about 281.6028857059.

Adding to 22331161 its reverse (16113322), we get a palindrome (38444483).

The spelling of 22331161 in words is "twenty-two million, three hundred thirty-one thousand, one hundred sixty-one".