225253520 has 20 divisors (see below), whose sum is σ = 523714620. Its totient is φ = 90101376.

The previous prime is 225253517. The next prime is 225253547. The reversal of 225253520 is 25352522.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 79423744 + 145829776 = 8912^2 + 12076^2 .

It is a tau number, because it is divible by the number of its divisors (20).

It is a self number, because there is not a number n which added to its sum of digits gives 225253520.

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, 1407755 + ... + 1407914.

It is an arithmetic number, because the mean of its divisors is an integer number (26185731).

Almost surely, 2^225253520 is an apocalyptic number.

225253520 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

225253520 is an abundant number, since it is smaller than the sum of its proper divisors (298461100).

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

225253520 is a wasteful number, since it uses less digits than its factorization.

225253520 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2815682 (or 2815676 counting only the distinct ones).

The product of its (nonzero) digits is 6000, while the sum is 26.

The square root of 225253520 is about 15008.4482875479. The cubic root of 225253520 is about 608.4485523092.

The spelling of 225253520 in words is "two hundred twenty-five million, two hundred fifty-three thousand, five hundred twenty".