225851240 has 16 divisors (see below), whose sum is σ = 508165380. Its totient is φ = 90340480.

The previous prime is 225851203. The next prime is 225851243. The reversal of 225851240 is 42158522.

It can be written as a sum of positive squares in 2 ways, for example, as 199204996 + 26646244 = 14114^2 + 5162^2 .

It is not an unprimeable number, because it can be changed into a prime (225851243) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2823101 + ... + 2823180.

Almost surely, 2^225851240 is an apocalyptic number.

225851240 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

225851240 is an abundant number, since it is smaller than the sum of its proper divisors (282314140).

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

225851240 is a wasteful number, since it uses less digits than its factorization.

225851240 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5646292 (or 5646288 counting only the distinct ones).

The product of its (nonzero) digits is 6400, while the sum is 29.

The square root of 225851240 is about 15028.3478799235. The cubic root of 225851240 is about 608.9862585349.

The spelling of 225851240 in words is "two hundred twenty-five million, eight hundred fifty-one thousand, two hundred forty".