225176854481681 has 2 divisors, whose sum is σ = 225176854481682. Its totient is φ = 225176854481680.

The previous prime is 225176854481671. The next prime is 225176854481717. The reversal of 225176854481681 is 186184458671522.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 155380587780625 + 69796266701056 = 12465175^2 + 8354416^2 .

It is a cyclic number.

It is not a de Polignac number, because 225176854481681 - 2³⁴ = 225159674612497 is a prime.

It is a super-2 number, since 2×225176854481681² (a number of 30 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (225176854481671) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 112588427240840 + 112588427240841.

It is an arithmetic number, because the mean of its divisors is an integer number (112588427240841).

Almost surely, 2^{225176854481681} is an apocalyptic number.

It is an amenable number.

225176854481681 is a deficient number, since it is larger than the sum of its proper divisors (1).

225176854481681 is an equidigital number, since it uses as much as digits as its factorization.

225176854481681 is an evil number, because the sum of its binary digits is even.

The product of its digits is 206438400, while the sum is 68.

The spelling of 225176854481681 in words is "two hundred twenty-five trillion, one hundred seventy-six billion, eight hundred fifty-four million, four hundred eighty-one thousand, six hundred eighty-one".