225243455609 has 2 divisors, whose sum is σ = 225243455610. Its totient is φ = 225243455608.

The previous prime is 225243455599. The next prime is 225243455617. The reversal of 225243455609 is 906554342522.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 164418085225 + 60825370384 = 405485^2 + 246628^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-225243455609 is a prime.

It is a super-2 number, since 2×225243455609² (a number of 24 digits) contains 22 as substring.

It is a Sophie Germain prime.

It is a Curzon number.

It is not a weakly prime, because it can be changed into another prime (225243455639) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 112621727804 + 112621727805.

It is an arithmetic number, because the mean of its divisors is an integer number (112621727805).

Almost surely, 2^225243455609 is an apocalyptic number.

It is an amenable number.

225243455609 is a deficient number, since it is larger than the sum of its proper divisors (1).

225243455609 is an equidigital number, since it uses as much as digits as its factorization.

225243455609 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 2592000, while the sum is 47.

The spelling of 225243455609 in words is "two hundred twenty-five billion, two hundred forty-three million, four hundred fifty-five thousand, six hundred nine".