225400817 has 2 divisors, whose sum is σ = 225400818. Its totient is φ = 225400816.

The previous prime is 225400811. The next prime is 225400823. The reversal of 225400817 is 718004522.

It is a balanced prime because it is at equal distance from previous prime (225400811) and next prime (225400823).

It can be written as a sum of positive squares in only one way, i.e., 191656336 + 33744481 = 13844^2 + 5809^2 .

It is a cyclic number.

It is not a de Polignac number, because 225400817 - 2⁸ = 225400561 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 225400817.

It is not a weakly prime, because it can be changed into another prime (225400811) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 112700408 + 112700409.

It is an arithmetic number, because the mean of its divisors is an integer number (112700409).

Almost surely, 2^225400817 is an apocalyptic number.

It is an amenable number.

225400817 is a deficient number, since it is larger than the sum of its proper divisors (1).

225400817 is an equidigital number, since it uses as much as digits as its factorization.

225400817 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 4480, while the sum is 29.

The square root of 225400817 is about 15013.3546218026. The cubic root of 225400817 is about 608.5811482663.

The spelling of 225400817 in words is "two hundred twenty-five million, four hundred thousand, eight hundred seventeen".