2215789823 has 16 divisors (see below), whose sum is σ = 2534901600. Its totient is φ = 1919894400.

The previous prime is 2215789819. The next prime is 2215789831. The reversal of 2215789823 is 3289875122.

It is a cyclic number.

It is not a de Polignac number, because 2215789823 - 2² = 2215789819 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2215789223) 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, 14228 + ... + 68073.

It is an arithmetic number, because the mean of its divisors is an integer number (158431350).

Almost surely, 2^2215789823 is an apocalyptic number.

2215789823 is a deficient number, since it is larger than the sum of its proper divisors (319111777).

2215789823 is a wasteful number, since it uses less digits than its factorization.

2215789823 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 82442.

The product of its digits is 483840, while the sum is 47.

The square root of 2215789823 is about 47072.1767395560. The cubic root of 2215789823 is about 1303.6955639991.

The spelling of 2215789823 in words is "two billion, two hundred fifteen million, seven hundred eighty-nine thousand, eight hundred twenty-three".