225224440 has 64 divisors (see below), whose sum is σ = 599140800. Its totient is φ = 74554368.

The previous prime is 225224431. The next prime is 225224443. The reversal of 225224440 is 44422522.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (225224443) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 5749 + ... + 21988.

It is an arithmetic number, because the mean of its divisors is an integer number (9361575).

Almost surely, 2^225224440 is an apocalyptic number.

225224440 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

225224440 is an abundant number, since it is smaller than the sum of its proper divisors (373916360).

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

225224440 is a wasteful number, since it uses less digits than its factorization.

225224440 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 27784 (or 27780 counting only the distinct ones).

The product of its (nonzero) digits is 5120, while the sum is 25.

The square root of 225224440 is about 15007.4794685850. The cubic root of 225224440 is about 608.4223678196.

Adding to 225224440 its reverse (44422522), we get a palindrome (269646962).

It can be divided in two parts, 22522 and 4440, that added together give a palindrome (26962).

The spelling of 225224440 in words is "two hundred twenty-five million, two hundred twenty-four thousand, four hundred forty".