225861500 has 24 divisors (see below), whose sum is σ = 493282608. Its totient is φ = 90344400.

The previous prime is 225861487. The next prime is 225861521. The reversal of 225861500 is 5168522.

It is a hoax number, since the sum of its digits (29) coincides with the sum of the digits of its distinct prime factors.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 225362 + ... + 226361.

It is an arithmetic number, because the mean of its divisors is an integer number (20553442).

Almost surely, 2^225861500 is an apocalyptic number.

225861500 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

225861500 is an abundant number, since it is smaller than the sum of its proper divisors (267421108).

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

225861500 is a wasteful number, since it uses less digits than its factorization.

225861500 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 451742 (or 451730 counting only the distinct ones).

The product of its (nonzero) digits is 4800, while the sum is 29.

The square root of 225861500 is about 15028.6892309343. The cubic root of 225861500 is about 608.9954800980.

The spelling of 225861500 in words is "two hundred twenty-five million, eight hundred sixty-one thousand, five hundred".