225440423 has 6 divisors (see below), whose sum is σ = 244116144. Its totient is φ = 208098696.

The previous prime is 225440381. The next prime is 225440431. The reversal of 225440423 is 324044522.

It is a happy number.

It is not a de Polignac number, because 225440423 - 2⁶ = 225440359 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 225440392 and 225440401.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (225440473) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 666815 + ... + 667152.

It is an arithmetic number, because the mean of its divisors is an integer number (40686024).

Almost surely, 2^225440423 is an apocalyptic number.

225440423 is a deficient number, since it is larger than the sum of its proper divisors (18675721).

225440423 is a wasteful number, since it uses less digits than its factorization.

225440423 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1333993 (or 1333980 counting only the distinct ones).

The product of its (nonzero) digits is 7680, while the sum is 26.

The square root of 225440423 is about 15014.6735895257. The cubic root of 225440423 is about 608.6167915168.

Adding to 225440423 its reverse (324044522), we get a palindrome (549484945).

It can be divided in two parts, 22 and 5440423, that added together give a palindrome (5440445).

The spelling of 225440423 in words is "two hundred twenty-five million, four hundred forty thousand, four hundred twenty-three".