225595691 has 2 divisors, whose sum is σ = 225595692. Its totient is φ = 225595690.

The previous prime is 225595681. The next prime is 225595709. The reversal of 225595691 is 196595522.

225595691 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 225595691 - 2¹⁰ = 225594667 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (225595621) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 112797845 + 112797846.

It is an arithmetic number, because the mean of its divisors is an integer number (112797846).

Almost surely, 2^225595691 is an apocalyptic number.

225595691 is a deficient number, since it is larger than the sum of its proper divisors (1).

225595691 is an equidigital number, since it uses as much as digits as its factorization.

225595691 is an evil number, because the sum of its binary digits is even.

The product of its digits is 243000, while the sum is 44.

The square root of 225595691 is about 15019.8432415255. The cubic root of 225595691 is about 608.7564840414.

The spelling of 225595691 in words is "two hundred twenty-five million, five hundred ninety-five thousand, six hundred ninety-one".