2543536139 has 4 divisors (see below), whose sum is σ = 2544791760. Its totient is φ = 2542280520.

The previous prime is 2543536123. The next prime is 2543536159. The reversal of 2543536139 is 9316353452.

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

It is a cyclic number.

It is not a de Polignac number, because 2543536139 - 2⁴ = 2543536123 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 2543536096 and 2543536105.

It is not an unprimeable number, because it can be changed into a prime (2543536159) 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, 624767 + ... + 628824.

It is an arithmetic number, because the mean of its divisors is an integer number (636197940).

Almost surely, 2^2543536139 is an apocalyptic number.

2543536139 is a deficient number, since it is larger than the sum of its proper divisors (1255621).

2543536139 is a wasteful number, since it uses less digits than its factorization.

2543536139 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1255620.

The product of its digits is 291600, while the sum is 41.

The square root of 2543536139 is about 50433.4823207757. The cubic root of 2543536139 is about 1365.0418641197.

The spelling of 2543536139 in words is "two billion, five hundred forty-three million, five hundred thirty-six thousand, one hundred thirty-nine".