2159243109 has 8 divisors (see below), whose sum is σ = 3198878720. Its totient is φ = 1439495388.

The previous prime is 2159243101. The next prime is 2159243113. The reversal of 2159243109 is 9013429512.

2159243109 is a `hidden beast` number, since 21 + 592 + 43 + 1 + 0 + 9 = 666.

2159243109 is digitally balanced in base 2 and base 4, because in such bases it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 2159243109 - 2³ = 2159243101 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2159243101) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 39985957 + ... + 39986010.

It is an arithmetic number, because the mean of its divisors is an integer number (399859840).

Almost surely, 2^2159243109 is an apocalyptic number.

It is an amenable number.

2159243109 is a deficient number, since it is larger than the sum of its proper divisors (1039635611).

2159243109 is an equidigital number, since it uses as much as digits as its factorization.

2159243109 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 79971976 (or 79971970 counting only the distinct ones).

The product of its (nonzero) digits is 19440, while the sum is 36.

The square root of 2159243109 is about 46467.6565903640. The cubic root of 2159243109 is about 1292.5098082105.

The spelling of 2159243109 in words is "two billion, one hundred fifty-nine million, two hundred forty-three thousand, one hundred nine".