225278 has 8 divisors (see below), whose sum is σ = 342768. Its totient is φ = 111024.

The previous prime is 225263. The next prime is 225287. The reversal of 225278 is 872522.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a Curzon number.

It is a congruent number.

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, 626 + ... + 917.

It is an arithmetic number, because the mean of its divisors is an integer number (42846).

2²²⁵²⁷⁸ is an apocalyptic number.

225278 is a deficient number, since it is larger than the sum of its proper divisors (117490).

225278 is a wasteful number, since it uses less digits than its factorization.

225278 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1618.

The product of its digits is 2240, while the sum is 26.

The square root of 225278 is about 474.6345962949. The cubic root of 225278 is about 60.8470593076.

The spelling of 225278 in words is "two hundred twenty-five thousand, two hundred seventy-eight".