225656162729 has 2 divisors, whose sum is σ = 225656162730. Its totient is φ = 225656162728.

The previous prime is 225656162701. The next prime is 225656162749. The reversal of 225656162729 is 927261656522.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 148579411600 + 77076751129 = 385460^2 + 277627^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-225656162729 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is not a weakly prime, because it can be changed into another prime (225656162749) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 112828081364 + 112828081365.

It is an arithmetic number, because the mean of its divisors is an integer number (112828081365).

Almost surely, 2^225656162729 is an apocalyptic number.

It is an amenable number.

225656162729 is a deficient number, since it is larger than the sum of its proper divisors (1).

225656162729 is an equidigital number, since it uses as much as digits as its factorization.

225656162729 is an evil number, because the sum of its binary digits is even.

The product of its digits is 5443200, while the sum is 53.

The spelling of 225656162729 in words is "two hundred twenty-five billion, six hundred fifty-six million, one hundred sixty-two thousand, seven hundred twenty-nine".