185222261113 has 2 divisors, whose sum is σ = 185222261114. Its totient is φ = 185222261112.

The previous prime is 185222261099. The next prime is 185222261123. The reversal of 185222261113 is 311162222581.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 103167512809 + 82054748304 = 321197^2 + 286452^2 .

It is a cyclic number.

It is not a de Polignac number, because 185222261113 - 2³⁷ = 47783307641 is a prime.

It is not a weakly prime, because it can be changed into another prime (185222261123) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 92611130556 + 92611130557.

It is an arithmetic number, because the mean of its divisors is an integer number (92611130557).

Almost surely, 2^185222261113 is an apocalyptic number.

It is an amenable number.

185222261113 is a deficient number, since it is larger than the sum of its proper divisors (1).

185222261113 is an equidigital number, since it uses as much as digits as its factorization.

185222261113 is an evil number, because the sum of its binary digits is even.

The product of its digits is 11520, while the sum is 34.

Adding to 185222261113 its reverse (311162222581), we get a palindrome (496384483694).

The spelling of 185222261113 in words is "one hundred eighty-five billion, two hundred twenty-two million, two hundred sixty-one thousand, one hundred thirteen".