222491679 has 4 divisors (see below), whose sum is σ = 296655576. Its totient is φ = 148327784.

The previous prime is 222491641. The next prime is 222491701. The reversal of 222491679 is 976194222.

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

It is a cyclic number.

It is not a de Polignac number, because 222491679 - 2⁷ = 222491551 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 222491679.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (222496679) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 37081944 + ... + 37081949.

It is an arithmetic number, because the mean of its divisors is an integer number (74163894).

Almost surely, 2^222491679 is an apocalyptic number.

222491679 is a deficient number, since it is larger than the sum of its proper divisors (74163897).

222491679 is an equidigital number, since it uses as much as digits as its factorization.

222491679 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 74163896.

The product of its digits is 108864, while the sum is 42.

The square root of 222491679 is about 14916.1549670148. The cubic root of 222491679 is about 605.9515831222.

It can be divided in two parts, 2224916 and 79, that added together give a triangular number (2224995 = T₂₁₀₉).

The spelling of 222491679 in words is "two hundred twenty-two million, four hundred ninety-one thousand, six hundred seventy-nine".