222072218 has 4 divisors (see below), whose sum is σ = 333108330. Its totient is φ = 111036108.

The previous prime is 222072211. The next prime is 222072287. The reversal of 222072218 is 812270222.

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

It can be written as a sum of positive squares in only one way, i.e., 143448529 + 78623689 = 11977^2 + 8867^2 .

It is not an unprimeable number, because it can be changed into a prime (222072211) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 55518053 + ... + 55518056.

Almost surely, 2^222072218 is an apocalyptic number.

222072218 is a deficient number, since it is larger than the sum of its proper divisors (111036112).

222072218 is a wasteful number, since it uses less digits than its factorization.

222072218 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 111036111.

The product of its (nonzero) digits is 1792, while the sum is 26.

The square root of 222072218 is about 14902.0877060900. The cubic root of 222072218 is about 605.5705457196.

The spelling of 222072218 in words is "two hundred twenty-two million, seventy-two thousand, two hundred eighteen".