2779222861 has 8 divisors (see below), whose sum is σ = 2798006624. Its totient is φ = 2760460560.

The previous prime is 2779222841. The next prime is 2779222867. The reversal of 2779222861 is 1682229772.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-2779222861 is a prime.

It is a super-2 number, since 2×2779222861² = 15448159422210050642, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2779222867) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 319591 + ... + 328171.

It is an arithmetic number, because the mean of its divisors is an integer number (349750828).

Almost surely, 2^2779222861 is an apocalyptic number.

It is an amenable number.

2779222861 is a deficient number, since it is larger than the sum of its proper divisors (18783763).

2779222861 is a wasteful number, since it uses less digits than its factorization.

2779222861 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10731.

The product of its digits is 338688, while the sum is 46.

The square root of 2779222861 is about 52718.3351501164. The cubic root of 2779222861 is about 1405.9648326557.

It can be divided in two parts, 27792 and 22861, that added together give a cube (50653 = 37³).

The spelling of 2779222861 in words is "two billion, seven hundred seventy-nine million, two hundred twenty-two thousand, eight hundred sixty-one".