225040913 has 2 divisors, whose sum is σ = 225040914. Its totient is φ = 225040912.

The previous prime is 225040909. The next prime is 225040931. The reversal of 225040913 is 319040522.

225040913 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

Together with next prime (225040931) it forms an Ormiston pair, because they use the same digits, order apart.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 191075329 + 33965584 = 13823^2 + 5828^2 .

It is a cyclic number.

It is not a de Polignac number, because 225040913 - 2² = 225040909 is a prime.

It is not a weakly prime, because it can be changed into another prime (225040903) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 112520456 + 112520457.

It is an arithmetic number, because the mean of its divisors is an integer number (112520457).

Almost surely, 2^225040913 is an apocalyptic number.

It is an amenable number.

225040913 is a deficient number, since it is larger than the sum of its proper divisors (1).

225040913 is an equidigital number, since it uses as much as digits as its factorization.

225040913 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 2160, while the sum is 26.

The square root of 225040913 is about 15001.3637046770. The cubic root of 225040913 is about 608.2570626757.

The spelling of 225040913 in words is "two hundred twenty-five million, forty thousand, nine hundred thirteen".