2215781163 has 48 divisors (see below), whose sum is σ = 3517768800. Its totient is φ = 1391281920.

The previous prime is 2215781143. The next prime is 2215781201. The reversal of 2215781163 is 3611875122.

2215781163 is a `hidden beast` number, since 2 + 21 + 578 + 1 + 1 + 63 = 666.

It is not a de Polignac number, because 2215781163 - 2⁵ = 2215781131 is a prime.

It is not an unprimeable number, because it can be changed into a prime (2215781143) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 285093 + ... + 292761.

It is an arithmetic number, because the mean of its divisors is an integer number (73286850).

Almost surely, 2^2215781163 is an apocalyptic number.

2215781163 is a deficient number, since it is larger than the sum of its proper divisors (1301987637).

2215781163 is an equidigital number, since it uses as much as digits as its factorization.

2215781163 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7754 (or 7742 counting only the distinct ones).

The product of its digits is 20160, while the sum is 36.

The square root of 2215781163 is about 47072.0847530678. The cubic root of 2215781163 is about 1303.6938655801.

The spelling of 2215781163 in words is "two billion, two hundred fifteen million, seven hundred eighty-one thousand, one hundred sixty-three".