222979791 has 16 divisors (see below), whose sum is σ = 301721600. Its totient is φ = 146454048.

The previous prime is 222979787. The next prime is 222979793. The reversal of 222979791 is 197979222.

It is not a de Polignac number, because 222979791 - 2² = 222979787 is a prime.

It is a Smith number, since the sum of its digits (48) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 222979791.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (222979793) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 167370 + ... + 168696.

It is an arithmetic number, because the mean of its divisors is an integer number (18857600).

Almost surely, 2^222979791 is an apocalyptic number.

222979791 is a deficient number, since it is larger than the sum of its proper divisors (78741809).

222979791 is a wasteful number, since it uses less digits than its factorization.

222979791 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2118.

The product of its digits is 285768, while the sum is 48.

The square root of 222979791 is about 14932.5078603696. The cubic root of 222979791 is about 606.3943805203.

The spelling of 222979791 in words is "two hundred twenty-two million, nine hundred seventy-nine thousand, seven hundred ninety-one".