2105523191 has 2 divisors, whose sum is σ = 2105523192. Its totient is φ = 2105523190.

The previous prime is 2105523179. The next prime is 2105523227. The reversal of 2105523191 is 1913255012.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-2105523191 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2105523991) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1052761595 + 1052761596.

It is an arithmetic number, because the mean of its divisors is an integer number (1052761596).

Almost surely, 2^2105523191 is an apocalyptic number.

2105523191 is a deficient number, since it is larger than the sum of its proper divisors (1).

2105523191 is an equidigital number, since it uses as much as digits as its factorization.

2105523191 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 2700, while the sum is 29.

The square root of 2105523191 is about 45885.9803316874. The cubic root of 2105523191 is about 1281.7008620649.

The spelling of 2105523191 in words is "two billion, one hundred five million, five hundred twenty-three thousand, one hundred ninety-one".