225844961 has 2 divisors, whose sum is σ = 225844962. Its totient is φ = 225844960.

The previous prime is 225844939. The next prime is 225844967. The reversal of 225844961 is 169448522.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 135955600 + 89889361 = 11660^2 + 9481^2 .

It is a cyclic number.

It is not a de Polignac number, because 225844961 - 2⁶ = 225844897 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 (225844967) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 112922480 + 112922481.

It is an arithmetic number, because the mean of its divisors is an integer number (112922481).

Almost surely, 2^225844961 is an apocalyptic number.

It is an amenable number.

225844961 is a deficient number, since it is larger than the sum of its proper divisors (1).

225844961 is an equidigital number, since it uses as much as digits as its factorization.

225844961 is an evil number, because the sum of its binary digits is even.

The product of its digits is 138240, while the sum is 41.

The square root of 225844961 is about 15028.1389732728. The cubic root of 225844961 is about 608.9806149083.

The spelling of 225844961 in words is "two hundred twenty-five million, eight hundred forty-four thousand, nine hundred sixty-one".