225610399321 has 2 divisors, whose sum is σ = 225610399322. Its totient is φ = 225610399320.

The previous prime is 225610399243. The next prime is 225610399379. The reversal of 225610399321 is 123993016522.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 161266496400 + 64343902921 = 401580^2 + 253661^2 .

It is a cyclic number.

It is not a de Polignac number, because 225610399321 - 2¹³ = 225610391129 is a prime.

It is a super-2 number, since 2×225610399321² (a number of 24 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (225610339321) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 112805199660 + 112805199661.

It is an arithmetic number, because the mean of its divisors is an integer number (112805199661).

Almost surely, 2^225610399321 is an apocalyptic number.

It is an amenable number.

225610399321 is a deficient number, since it is larger than the sum of its proper divisors (1).

225610399321 is an equidigital number, since it uses as much as digits as its factorization.

225610399321 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 174960, while the sum is 43.

The spelling of 225610399321 in words is "two hundred twenty-five billion, six hundred ten million, three hundred ninety-nine thousand, three hundred twenty-one".