225767809 has 2 divisors, whose sum is σ = 225767810. Its totient is φ = 225767808.

The previous prime is 225767783. The next prime is 225767819. The reversal of 225767809 is 908767522.

225767809 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 127757809 + 98010000 = 11303^2 + 9900^2 .

It is a cyclic number.

It is not a de Polignac number, because 225767809 - 2⁷ = 225767681 is a prime.

It is a super-2 number, since 2×225767809² = 101942207161320962, which contains 22 as substring.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (225767819) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 112883904 + 112883905.

It is an arithmetic number, because the mean of its divisors is an integer number (112883905).

Almost surely, 2^225767809 is an apocalyptic number.

It is an amenable number.

225767809 is a deficient number, since it is larger than the sum of its proper divisors (1).

225767809 is an equidigital number, since it uses as much as digits as its factorization.

225767809 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 423360, while the sum is 46.

The square root of 225767809 is about 15025.5718360401. The cubic root of 225767809 is about 608.9112613964.

It can be divided in two parts, 225767 and 809, that added together give a square (226576 = 476²).

The spelling of 225767809 in words is "two hundred twenty-five million, seven hundred sixty-seven thousand, eight hundred nine".