225985178 has 12 divisors (see below), whose sum is σ = 340547550. Its totient is φ = 112470816.

The previous prime is 225985147. The next prime is 225985211. The reversal of 225985178 is 871589522.

It can be written as a sum of positive squares in 3 ways, for example, as 145757329 + 80227849 = 12073^2 + 8957^2 .

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 396878 + ... + 397446.

Almost surely, 2^225985178 is an apocalyptic number.

225985178 is a deficient number, since it is larger than the sum of its proper divisors (114562372).

225985178 is an frugal number, since it uses more digits than its factorization.

225985178 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1489 (or 920 counting only the distinct ones).

The product of its digits is 403200, while the sum is 47.

The square root of 225985178 is about 15032.8033979029. The cubic root of 225985178 is about 609.1066184125.

The spelling of 225985178 in words is "two hundred twenty-five million, nine hundred eighty-five thousand, one hundred seventy-eight".