225603423257 has 4 divisors (see below), whose sum is σ = 225628926900. Its totient is φ = 225577919616.

The previous prime is 225603423193. The next prime is 225603423263. The reversal of 225603423257 is 752324306522.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 67462789696 + 158140633561 = 259736^2 + 397669^2 .

It is a cyclic number.

It is not a de Polignac number, because 225603423257 - 2⁶ = 225603423193 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (225603473257) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 12738548 + ... + 12756245.

It is an arithmetic number, because the mean of its divisors is an integer number (56407231725).

Almost surely, 2^225603423257 is an apocalyptic number.

It is an amenable number.

225603423257 is a deficient number, since it is larger than the sum of its proper divisors (25503643).

225603423257 is an equidigital number, since it uses as much as digits as its factorization.

225603423257 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 25503642.

The product of its (nonzero) digits is 604800, while the sum is 41.

Adding to 225603423257 its reverse (752324306522), we get a palindrome (977927729779).

The spelling of 225603423257 in words is "two hundred twenty-five billion, six hundred three million, four hundred twenty-three thousand, two hundred fifty-seven".