222278 has 8 divisors (see below), whose sum is σ = 381072. Its totient is φ = 95256.

The previous prime is 222269. The next prime is 222289. The reversal of 222278 is 872222.

It is a happy number.

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

It is a Curzon number.

It is a plaindrome in base 10.

It is a nialpdrome in base 12.

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, 7925 + ... + 7952.

It is an arithmetic number, because the mean of its divisors is an integer number (47634).

2²²²²⁷⁸ is an apocalyptic number.

222278 is a deficient number, since it is larger than the sum of its proper divisors (158794).

222278 is a wasteful number, since it uses less digits than its factorization.

222278 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15886.

The product of its digits is 896, while the sum is 23.

The square root of 222278 is about 471.4636783465. The cubic root of 222278 is about 60.5757537512.

It can be divided in two parts, 222 and 278, that multiplied together give a palindrome (61716).

The spelling of 222278 in words is "two hundred twenty-two thousand, two hundred seventy-eight".