22531115161 has 2 divisors, whose sum is σ = 22531115162. Its totient is φ = 22531115160.

The previous prime is 22531115153. The next prime is 22531115227. The reversal of 22531115161 is 16151113522.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 13340250000 + 9190865161 = 115500^2 + 95869^2 .

It is a cyclic number.

It is not a de Polignac number, because 22531115161 - 2³ = 22531115153 is a prime.

It is not a weakly prime, because it can be changed into another prime (22531115861) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 11265557580 + 11265557581.

It is an arithmetic number, because the mean of its divisors is an integer number (11265557581).

Almost surely, 2^22531115161 is an apocalyptic number.

It is an amenable number.

22531115161 is a deficient number, since it is larger than the sum of its proper divisors (1).

22531115161 is an equidigital number, since it uses as much as digits as its factorization.

22531115161 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1800, while the sum is 28.

Adding to 22531115161 its reverse (16151113522), we get a palindrome (38682228683).

The spelling of 22531115161 in words is "twenty-two billion, five hundred thirty-one million, one hundred fifteen thousand, one hundred sixty-one".