2140055809 has 4 divisors (see below), whose sum is σ = 2169371716. Its totient is φ = 2110739904.

The previous prime is 2140055789. The next prime is 2140055831. The reversal of 2140055809 is 9085500412.

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

It can be written as a sum of positive squares in 2 ways, for example, as 881793025 + 1258262784 = 29695^2 + 35472^2 .

It is a cyclic number.

It is not a de Polignac number, because 2140055809 - 2⁷ = 2140055681 is a prime.

It is a super-3 number, since 3×2140055809³ (a number of 29 digits) contains 333 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2140059809) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 14657844 + ... + 14657989.

It is an arithmetic number, because the mean of its divisors is an integer number (542342929).

Almost surely, 2^2140055809 is an apocalyptic number.

It is an amenable number.

2140055809 is a deficient number, since it is larger than the sum of its proper divisors (29315907).

2140055809 is an equidigital number, since it uses as much as digits as its factorization.

2140055809 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 29315906.

The product of its (nonzero) digits is 14400, while the sum is 34.

The square root of 2140055809 is about 46260.7372293179. The cubic root of 2140055809 is about 1288.6699447431.

The spelling of 2140055809 in words is "two billion, one hundred forty million, fifty-five thousand, eight hundred nine".