225443917 has 2 divisors, whose sum is σ = 225443918. Its totient is φ = 225443916.

The previous prime is 225443899. The next prime is 225443921. The reversal of 225443917 is 719344522.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 126023076 + 99420841 = 11226^2 + 9971^2 .

It is a cyclic number.

It is not a de Polignac number, because 225443917 - 2¹¹ = 225441869 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (225443017) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 112721958 + 112721959.

It is an arithmetic number, because the mean of its divisors is an integer number (112721959).

Almost surely, 2^225443917 is an apocalyptic number.

It is an amenable number.

225443917 is a deficient number, since it is larger than the sum of its proper divisors (1).

225443917 is an equidigital number, since it uses as much as digits as its factorization.

225443917 is an evil number, because the sum of its binary digits is even.

The product of its digits is 60480, while the sum is 37.

The square root of 225443917 is about 15014.7899419206. The cubic root of 225443917 is about 608.6199357268.

The spelling of 225443917 in words is "two hundred twenty-five million, four hundred forty-three thousand, nine hundred seventeen".