2108851831 has 2 divisors, whose sum is σ = 2108851832. Its totient is φ = 2108851830.

The previous prime is 2108851817. The next prime is 2108851837. The reversal of 2108851831 is 1381588012.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 2108851831 - 2¹⁷ = 2108720759 is a prime.

It is a super-2 number, since 2×2108851831² = 8894512090224105122, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2108851837) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1054425915 + 1054425916.

It is an arithmetic number, because the mean of its divisors is an integer number (1054425916).

Almost surely, 2^2108851831 is an apocalyptic number.

2108851831 is a deficient number, since it is larger than the sum of its proper divisors (1).

2108851831 is an equidigital number, since it uses as much as digits as its factorization.

2108851831 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 15360, while the sum is 37.

The square root of 2108851831 is about 45922.2367813241. The cubic root of 2108851831 is about 1282.3759238147.

The spelling of 2108851831 in words is "two billion, one hundred eight million, eight hundred fifty-one thousand, eight hundred thirty-one".