2215564723 has 16 divisors (see below), whose sum is σ = 2368878336. Its totient is φ = 2067135840.

The previous prime is 2215564721. The next prime is 2215564751. The reversal of 2215564723 is 3274655122.

It is a cyclic number.

It is not a de Polignac number, because 2215564723 - 2¹ = 2215564721 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2215564721) 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, 1222488 + ... + 1224298.

It is an arithmetic number, because the mean of its divisors is an integer number (148054896).

Almost surely, 2^2215564723 is an apocalyptic number.

2215564723 is a gapful number since it is divisible by the number (23) formed by its first and last digit.

2215564723 is a deficient number, since it is larger than the sum of its proper divisors (153313613).

2215564723 is a wasteful number, since it uses less digits than its factorization.

2215564723 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3114.

The product of its digits is 100800, while the sum is 37.

The square root of 2215564723 is about 47069.7856697903. The cubic root of 2215564723 is about 1303.6514154361.

The spelling of 2215564723 in words is "two billion, two hundred fifteen million, five hundred sixty-four thousand, seven hundred twenty-three".