222478 has 8 divisors (see below), whose sum is σ = 336168. Its totient is φ = 110424.

The previous prime is 222461. The next prime is 222493. The reversal of 222478 is 874222.

222478 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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

It is a plaindrome in base 10.

It is a congruent number.

It is an unprimeable number.

222478 is an untouchable number, because it is not equal to the sum of proper divisors of any number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 25 + ... + 667.

It is an arithmetic number, because the mean of its divisors is an integer number (42021).

2²²²⁴⁷⁸ is an apocalyptic number.

222478 is a deficient number, since it is larger than the sum of its proper divisors (113690).

222478 is a wasteful number, since it uses less digits than its factorization.

222478 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 818.

The product of its digits is 1792, while the sum is 25.

The square root of 222478 is about 471.6757360730. The cubic root of 222478 is about 60.5939164708.

It can be divided in two parts, 22 and 2478, that added together give a square (2500 = 50²).

The spelling of 222478 in words is "two hundred twenty-two thousand, four hundred seventy-eight".