225345320 has 32 divisors (see below), whose sum is σ = 533714400. Its totient is φ = 85393728.

The previous prime is 225345311. The next prime is 225345331. The reversal of 225345320 is 23543522.

It is a self number, because there is not a number n which added to its sum of digits gives 225345320.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 147494 + ... + 149013.

It is an arithmetic number, because the mean of its divisors is an integer number (16678575).

Almost surely, 2^225345320 is an apocalyptic number.

225345320 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

225345320 is an abundant number, since it is smaller than the sum of its proper divisors (308369080).

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

225345320 is a wasteful number, since it uses less digits than its factorization.

225345320 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 296537 (or 296533 counting only the distinct ones).

The product of its (nonzero) digits is 7200, while the sum is 26.

The square root of 225345320 is about 15011.5062535377. The cubic root of 225345320 is about 608.5311969533.

Adding to 225345320 its reverse (23543522), we get a palindrome (248888842).

The spelling of 225345320 in words is "two hundred twenty-five million, three hundred forty-five thousand, three hundred twenty".