225123251 has 4 divisors (see below), whose sum is σ = 230614104. Its totient is φ = 219632400.

The previous prime is 225123221. The next prime is 225123263. The reversal of 225123251 is 152321522.

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

It is a cyclic number.

It is not a de Polignac number, because 225123251 - 2²² = 220928947 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (225123221) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2745365 + ... + 2745446.

It is an arithmetic number, because the mean of its divisors is an integer number (57653526).

Almost surely, 2^225123251 is an apocalyptic number.

225123251 is a deficient number, since it is larger than the sum of its proper divisors (5490853).

225123251 is an equidigital number, since it uses as much as digits as its factorization.

225123251 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5490852.

The product of its digits is 1200, while the sum is 23.

The square root of 225123251 is about 15004.1078041982. The cubic root of 225123251 is about 608.3312366893.

Adding to 225123251 its reverse (152321522), we get a palindrome (377444773).

The spelling of 225123251 in words is "two hundred twenty-five million, one hundred twenty-three thousand, two hundred fifty-one".