718222 has 4 divisors (see below), whose sum is σ = 1077336. Its totient is φ = 359110.

The previous prime is 718187. The next prime is 718241. The reversal of 718222 is 222817.

It is a semiprime because it is the product of two primes.

It is a Smith number, since the sum of its digits (22) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a junction number, because it is equal to n+sod(n) for n = 718193 and 718202.

It is a congruent number.

It is an unprimeable number.

718222 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 as a sum of consecutive naturals, namely, 179554 + ... + 179557.

It is an arithmetic number, because the mean of its divisors is an integer number (269334).

2⁷¹⁸²²² is an apocalyptic number.

718222 is a deficient number, since it is larger than the sum of its proper divisors (359114).

718222 is a wasteful number, since it uses less digits than its factorization.

718222 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 359113.

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

The square root of 718222 is about 847.4797932694. The cubic root of 718222 is about 89.5542569178.

It can be divided in two parts, 71822 and 2, that added together give a square (71824 = 268²).

The spelling of 718222 in words is "seven hundred eighteen thousand, two hundred twenty-two".