225117440 has 36 divisors (see below), whose sum is σ = 539229684. Its totient is φ = 90046464.

The previous prime is 225117421. The next prime is 225117457. The reversal of 225117440 is 44711522.

225117440 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 2 ways, for example, as 132342016 + 92775424 = 11504^2 + 9632^2 .

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 86657 + ... + 89216.

Almost surely, 2^225117440 is an apocalyptic number.

225117440 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

225117440 is an abundant number, since it is smaller than the sum of its proper divisors (314112244).

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

225117440 is an equidigital number, since it uses as much as digits as its factorization.

225117440 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 175894 (or 175880 counting only the distinct ones).

The product of its (nonzero) digits is 2240, while the sum is 26.

The square root of 225117440 is about 15003.9141559794. The cubic root of 225117440 is about 608.3260024554.

Adding to 225117440 its reverse (44711522), we get a palindrome (269828962).

It can be divided in two parts, 2251 and 17440, that added together give a palindrome (19691).

The spelling of 225117440 in words is "two hundred twenty-five million, one hundred seventeen thousand, four hundred forty".