2218923191 has 2 divisors, whose sum is σ = 2218923192. Its totient is φ = 2218923190.

The previous prime is 2218923167. The next prime is 2218923199. The reversal of 2218923191 is 1913298122.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 2218923191 - 2¹⁸ = 2218661047 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2218923199) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1109461595 + 1109461596.

It is an arithmetic number, because the mean of its divisors is an integer number (1109461596).

Almost surely, 2^2218923191 is an apocalyptic number.

2218923191 is a deficient number, since it is larger than the sum of its proper divisors (1).

2218923191 is an equidigital number, since it uses as much as digits as its factorization.

2218923191 is an evil number, because the sum of its binary digits is even.

The product of its digits is 15552, while the sum is 38.

The square root of 2218923191 is about 47105.4475724411. The cubic root of 2218923191 is about 1304.3097970377.

The spelling of 2218923191 in words is "two billion, two hundred eighteen million, nine hundred twenty-three thousand, one hundred ninety-one".