2211718859 has 4 divisors (see below), whose sum is σ = 2527678704. Its totient is φ = 1895759016.

The previous prime is 2211718811. The next prime is 2211718877. The reversal of 2211718859 is 9588171122.

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 2211718859 - 2²⁸ = 1943283403 is a prime.

It is a super-2 number, since 2×2211718859² = 9783400622512523762, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2211718259) 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, 157979912 + ... + 157979925.

It is an arithmetic number, because the mean of its divisors is an integer number (631919676).

Almost surely, 2^2211718859 is an apocalyptic number.

2211718859 is a deficient number, since it is larger than the sum of its proper divisors (315959845).

2211718859 is an equidigital number, since it uses as much as digits as its factorization.

2211718859 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 315959844.

The product of its digits is 80640, while the sum is 44.

The square root of 2211718859 is about 47028.9151373918. The cubic root of 2211718859 is about 1302.8966688368.

The spelling of 2211718859 in words is "two billion, two hundred eleven million, seven hundred eighteen thousand, eight hundred fifty-nine".