225123345 has 12 divisors (see below), whose sum is σ = 390213876. Its totient is φ = 120065760.

The previous prime is 225123341. The next prime is 225123389. The reversal of 225123345 is 543321522.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 112275216 + 112848129 = 10596^2 + 10623^2 .

It is not a de Polignac number, because 225123345 - 2² = 225123341 is a prime.

It is a hoax number, since the sum of its digits (27) coincides with the sum of the digits of its distinct prime factors.

It is not an unprimeable number, because it can be changed into a prime (225123341) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 2501326 + ... + 2501415.

It is an arithmetic number, because the mean of its divisors is an integer number (32517823).

Almost surely, 2^225123345 is an apocalyptic number.

It is an amenable number.

225123345 is a deficient number, since it is larger than the sum of its proper divisors (165090531).

225123345 is a wasteful number, since it uses less digits than its factorization.

225123345 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5002752 (or 5002749 counting only the distinct ones).

The product of its digits is 7200, while the sum is 27.

The square root of 225123345 is about 15004.1109366733. The cubic root of 225123345 is about 608.3313213586.

Adding to 225123345 its reverse (543321522), we get a palindrome (768444867).

The spelling of 225123345 in words is "two hundred twenty-five million, one hundred twenty-three thousand, three hundred forty-five".