2215608191 has 4 divisors (see below), whose sum is σ = 2215881792. Its totient is φ = 2215334592.

The previous prime is 2215608173. The next prime is 2215608209. The reversal of 2215608191 is 1918065122.

It is a semiprime because it is the product of two primes.

It is an interprime number because it is at equal distance from previous prime (2215608173) and next prime (2215608209).

It is a cyclic number.

It is not a de Polignac number, because 2215608191 - 2⁶ = 2215608127 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 (2215608491) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 124271 + ... + 140976.

It is an arithmetic number, because the mean of its divisors is an integer number (553970448).

Almost surely, 2^2215608191 is an apocalyptic number.

2215608191 is a deficient number, since it is larger than the sum of its proper divisors (273601).

2215608191 is an equidigital number, since it uses as much as digits as its factorization.

2215608191 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 273600.

The product of its (nonzero) digits is 8640, while the sum is 35.

The square root of 2215608191 is about 47070.2474074654. The cubic root of 2215608191 is about 1303.6599409900.

The spelling of 2215608191 in words is "two billion, two hundred fifteen million, six hundred eight thousand, one hundred ninety-one".