222178 has 8 divisors (see below), whose sum is σ = 363600. Its totient is φ = 100980.

The previous prime is 222163. The next prime is 222193. The reversal of 222178 is 871222.

It is an interprime number because it is at equal distance from previous prime (222163) and next prime (222193).

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

It is a Harshad number since it is a multiple of its sum of digits (22), and also a Moran number because the ratio is a prime number: 10099 = 222178 / (2 + 2 + 2 + 1 + 7 + 8).

222178 is a modest number, since divided by 2178 gives 22 as remainder.

It is an unprimeable number.

222178 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, 5028 + ... + 5071.

It is an arithmetic number, because the mean of its divisors is an integer number (45450).

2²²²¹⁷⁸ is an apocalyptic number.

222178 is a deficient number, since it is larger than the sum of its proper divisors (141422).

222178 is a wasteful number, since it uses less digits than its factorization.

222178 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10112.

The product of its digits is 448, while the sum is 22.

The square root of 222178 is about 471.3576137075. The cubic root of 222178 is about 60.5666683057.

It can be divided in two parts, 222 and 178, that added together give a square (400 = 20²).

The spelling of 222178 in words is "two hundred twenty-two thousand, one hundred seventy-eight".