225323644 has 72 divisors (see below), whose sum is σ = 516868128. Its totient is φ = 83865600.

The previous prime is 225323621. The next prime is 225323647. The reversal of 225323644 is 446323522.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (225323647) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 79044 + ... + 81844.

It is an arithmetic number, because the mean of its divisors is an integer number (7178724).

Almost surely, 2^225323644 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 225323644, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (258434064).

225323644 is an abundant number, since it is smaller than the sum of its proper divisors (291544484).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

225323644 is a wasteful number, since it uses less digits than its factorization.

225323644 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2855 (or 2840 counting only the distinct ones).

The product of its digits is 34560, while the sum is 31.

The square root of 225323644 is about 15010.7842566603. The cubic root of 225323644 is about 608.5116847588.

The spelling of 225323644 in words is "two hundred twenty-five million, three hundred twenty-three thousand, six hundred forty-four".