2216681779 has 8 divisors (see below), whose sum is σ = 2394730800. Its totient is φ = 2039709216.

The previous prime is 2216681773. The next prime is 2216681807. The reversal of 2216681779 is 9771866122.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 2216681779 - 2⁹ = 2216681267 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2216681773) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 264829 + ... + 273070.

It is an arithmetic number, because the mean of its divisors is an integer number (299341350).

Almost surely, 2^2216681779 is an apocalyptic number.

2216681779 is a deficient number, since it is larger than the sum of its proper divisors (178049021).

2216681779 is a wasteful number, since it uses less digits than its factorization.

2216681779 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 538229.

The product of its digits is 508032, while the sum is 49.

The square root of 2216681779 is about 47081.6501303852. The cubic root of 2216681779 is about 1303.8704727489.

The spelling of 2216681779 in words is "two billion, two hundred sixteen million, six hundred eighty-one thousand, seven hundred seventy-nine".