225819719 has 2 divisors, whose sum is σ = 225819720. Its totient is φ = 225819718.

The previous prime is 225819691. The next prime is 225819751. The reversal of 225819719 is 917918522.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 225819719 - 2⁸ = 225819463 is a prime.

It is a super-2 number, since 2×225819719² = 101989090978477922, which contains 22 as substring.

It is a Sophie Germain prime.

It is a self number, because there is not a number n which added to its sum of digits gives 225819719.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (225819799) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 112909859 + 112909860.

It is an arithmetic number, because the mean of its divisors is an integer number (112909860).

Almost surely, 2^225819719 is an apocalyptic number.

225819719 is a deficient number, since it is larger than the sum of its proper divisors (1).

225819719 is an equidigital number, since it uses as much as digits as its factorization.

225819719 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 90720, while the sum is 44.

The square root of 225819719 is about 15027.2991252587. The cubic root of 225819719 is about 608.9579260966.

The spelling of 225819719 in words is "two hundred twenty-five million, eight hundred nineteen thousand, seven hundred nineteen".