225240040 has 32 divisors (see below), whose sum is σ = 513739080. Its totient is φ = 88860672.

The previous prime is 225240031. The next prime is 225240047. The reversal of 225240040 is 40042522.

It can be written as a sum of positive squares in 4 ways, for example, as 220284964 + 4955076 = 14842^2 + 2226^2 .

It is not an unprimeable number, because it can be changed into a prime (225240047) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 35649 + ... + 41488.

Almost surely, 2^225240040 is an apocalyptic number.

225240040 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

225240040 is an abundant number, since it is smaller than the sum of its proper divisors (288499040).

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

225240040 is a wasteful number, since it uses less digits than its factorization.

225240040 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 77221 (or 77217 counting only the distinct ones).

The product of its (nonzero) digits is 640, while the sum is 19.

The square root of 225240040 is about 15007.9992004264. Note that the first 3 decimals coincide. The cubic root of 225240040 is about 608.4364147998.

Adding to 225240040 its reverse (40042522), we get a palindrome (265282562).

The spelling of 225240040 in words is "two hundred twenty-five million, two hundred forty thousand, forty".