225730961 has 2 divisors, whose sum is σ = 225730962. Its totient is φ = 225730960.

The previous prime is 225730949. The next prime is 225730979. The reversal of 225730961 is 169037522.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 178890625 + 46840336 = 13375^2 + 6844^2 .

It is a cyclic number.

It is not a de Polignac number, because 225730961 - 2²² = 221536657 is a prime.

It is not a weakly prime, because it can be changed into another prime (225732961) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 112865480 + 112865481.

It is an arithmetic number, because the mean of its divisors is an integer number (112865481).

Almost surely, 2^225730961 is an apocalyptic number.

It is an amenable number.

225730961 is a deficient number, since it is larger than the sum of its proper divisors (1).

225730961 is an equidigital number, since it uses as much as digits as its factorization.

225730961 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 22680, while the sum is 35.

The square root of 225730961 is about 15024.3456097096. The cubic root of 225730961 is about 608.8781323998.

The spelling of 225730961 in words is "two hundred twenty-five million, seven hundred thirty thousand, nine hundred sixty-one".