225978425161 has 2 divisors, whose sum is σ = 225978425162. Its totient is φ = 225978425160.

The previous prime is 225978425033. The next prime is 225978425173. The reversal of 225978425161 is 161524879522.

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., 212457386761 + 13521038400 = 460931^2 + 116280^2 .

It is a cyclic number.

It is not a de Polignac number, because 225978425161 - 2⁷ = 225978425033 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 225978425099 and 225978425108.

It is not a weakly prime, because it can be changed into another prime (225978425861) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 112989212580 + 112989212581.

It is an arithmetic number, because the mean of its divisors is an integer number (112989212581).

Almost surely, 2^225978425161 is an apocalyptic number.

It is an amenable number.

225978425161 is a deficient number, since it is larger than the sum of its proper divisors (1).

225978425161 is an equidigital number, since it uses as much as digits as its factorization.

225978425161 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 2419200, while the sum is 52.

The spelling of 225978425161 in words is "two hundred twenty-five billion, nine hundred seventy-eight million, four hundred twenty-five thousand, one hundred sixty-one".