225781250 has 54 divisors (see below), whose sum is σ = 449706801. Its totient is φ = 85000000.

The previous prime is 225781247. The next prime is 225781273. The reversal of 225781250 is 52187522.

It is a happy number.

It can be written as a sum of positive squares in 14 ways, for example, as 209467729 + 16313521 = 14473^2 + 4039^2 .

It is an ABA number since it can be written as A⋅B^A, here for A=2, B=10625.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 26 ways as a sum of consecutive naturals, for example, 13281242 + ... + 13281258.

Almost surely, 2^225781250 is an apocalyptic number.

225781250 is a deficient number, since it is larger than the sum of its proper divisors (223925551).

225781250 is an frugal number, since it uses more digits than its factorization.

225781250 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 76 (or 24 counting only the distinct ones).

The product of its (nonzero) digits is 11200, while the sum is 32.

The square root of 225781250 is about 15026.0191002141. The cubic root of 225781250 is about 608.9233449229.

Multiplying 225781250 by its sum of digits (32), we get a square (7225000000 = 85000²).

The spelling of 225781250 in words is "two hundred twenty-five million, seven hundred eighty-one thousand, two hundred fifty".