2105983881 has 15 divisors (see below), whose sum is σ = 3146593021. Its totient is φ = 1403713908.

The previous prime is 2105983861. The next prime is 2105983897. The reversal of 2105983881 is 1883895012.

It is a happy number.

The square root of 2105983881 is 45891.

It is a perfect power (a square), and thus also a powerful number.

2105983881 is a `hidden beast` number, since 21 + 0 + 598 + 38 + 8 + 1 = 666.

2105983881 is digitally balanced in base 4, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 2105983881 - 2¹⁷ = 2105852809 is a prime.

It is a super-2 number, since 2×2105983881² = 8870336214063644322, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2105983801) by changing a digit.

It is a polite number, since it can be written in 14 ways as a sum of consecutive naturals, for example, 410470 + ... + 415568.

Almost surely, 2^2105983881 is an apocalyptic number.

2105983881 is the 45891-st square number.

2105983881 is the 22946-th centered octagonal number.

It is an amenable number.

2105983881 is a deficient number, since it is larger than the sum of its proper divisors (1040609140).

2105983881 is an frugal number, since it uses more digits than its factorization.

2105983881 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10210 (or 5102 counting only the distinct ones).

The product of its (nonzero) digits is 138240, while the sum is 45.

The cubic root of 2105983881 is about 1281.7943342738.

The spelling of 2105983881 in words is "two billion, one hundred five million, nine hundred eighty-three thousand, eight hundred eighty-one".