2100859291 has 4 divisors (see below), whose sum is σ = 2101316800. Its totient is φ = 2100401784.

The previous prime is 2100859249. The next prime is 2100859301. The reversal of 2100859291 is 1929580012.

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

It is a cyclic number.

It is not a de Polignac number, because 2100859291 - 2¹¹ = 2100857243 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 2100859291.

It is not an unprimeable number, because it can be changed into a prime (2100859091) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 221796 + ... + 231073.

It is an arithmetic number, because the mean of its divisors is an integer number (525329200).

Almost surely, 2^2100859291 is an apocalyptic number.

2100859291 is a deficient number, since it is larger than the sum of its proper divisors (457509).

2100859291 is an equidigital number, since it uses as much as digits as its factorization.

2100859291 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 457508.

The product of its (nonzero) digits is 12960, while the sum is 37.

The square root of 2100859291 is about 45835.1316241156. The cubic root of 2100859291 is about 1280.7538062728.

The spelling of 2100859291 in words is "two billion, one hundred million, eight hundred fifty-nine thousand, two hundred ninety-one".