225913691161 has 2 divisors, whose sum is σ = 225913691162. Its totient is φ = 225913691160.

The previous prime is 225913691147. The next prime is 225913691173. The reversal of 225913691161 is 161196319522.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 206642976400 + 19270714761 = 454580^2 + 138819^2 .

It is a cyclic number.

It is not a de Polignac number, because 225913691161 - 2²⁷ = 225779473433 is a prime.

It is not a weakly prime, because it can be changed into another prime (225913691191) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 112956845580 + 112956845581.

It is an arithmetic number, because the mean of its divisors is an integer number (112956845581).

Almost surely, 2^225913691161 is an apocalyptic number.

It is an amenable number.

225913691161 is a deficient number, since it is larger than the sum of its proper divisors (1).

225913691161 is an equidigital number, since it uses as much as digits as its factorization.

225913691161 is an evil number, because the sum of its binary digits is even.

The product of its digits is 174960, while the sum is 46.

The spelling of 225913691161 in words is "two hundred twenty-five billion, nine hundred thirteen million, six hundred ninety-one thousand, one hundred sixty-one".