225039720 has 32 divisors (see below), whose sum is σ = 675119520. Its totient is φ = 60010560.

The previous prime is 225039719. The next prime is 225039733. The reversal of 225039720 is 27930522.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (30).

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 937546 + ... + 937785.

It is an arithmetic number, because the mean of its divisors is an integer number (21097485).

Almost surely, 2^225039720 is an apocalyptic number.

225039720 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

225039720 is an abundant number, since it is smaller than the sum of its proper divisors (450079800).

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

225039720 is a wasteful number, since it uses less digits than its factorization.

225039720 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1875345 (or 1875341 counting only the distinct ones).

The product of its (nonzero) digits is 7560, while the sum is 30.

The square root of 225039720 is about 15001.3239415726. The cubic root of 225039720 is about 608.2559878312.

It can be divided in two parts, 22503 and 9720, that added together give a palindrome (32223).

The spelling of 225039720 in words is "two hundred twenty-five million, thirty-nine thousand, seven hundred twenty".