2159343943 has 16 divisors (see below), whose sum is σ = 2238632352. Its totient is φ = 2081520000.

The previous prime is 2159343929. The next prime is 2159344001. The reversal of 2159343943 is 3493439512.

It is a cyclic number.

It is not a de Polignac number, because 2159343943 - 2²⁵ = 2125789511 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (43).

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 2159343943.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2159343143) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1827813 + ... + 1828993.

It is an arithmetic number, because the mean of its divisors is an integer number (139914522).

Almost surely, 2^2159343943 is an apocalyptic number.

2159343943 is a deficient number, since it is larger than the sum of its proper divisors (79288409).

2159343943 is a wasteful number, since it uses less digits than its factorization.

2159343943 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1746.

The product of its digits is 349920, while the sum is 43.

The square root of 2159343943 is about 46468.7415689300. The cubic root of 2159343943 is about 1292.5299274373.

It can be divided in two parts, 21593 and 43943, that added together give a 16-th power (65536 = 2¹⁶).

The spelling of 2159343943 in words is "two billion, one hundred fifty-nine million, three hundred forty-three thousand, nine hundred forty-three".