2543555851 has 4 divisors (see below), whose sum is σ = 2568250672. Its totient is φ = 2518861032.

The previous prime is 2543555849. The next prime is 2543555881. The reversal of 2543555851 is 1585553452.

It is a happy number.

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 2543555851 - 2¹ = 2543555849 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 2543555798 and 2543555807.

It is not an unprimeable number, because it can be changed into a prime (2543555801) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 12347256 + ... + 12347461.

It is an arithmetic number, because the mean of its divisors is an integer number (642062668).

Almost surely, 2^2543555851 is an apocalyptic number.

2543555851 is a deficient number, since it is larger than the sum of its proper divisors (24694821).

2543555851 is a wasteful number, since it uses less digits than its factorization.

2543555851 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 24694820.

The product of its digits is 600000, while the sum is 43.

The square root of 2543555851 is about 50433.6777461252. The cubic root of 2543555851 is about 1365.0453903962.

The spelling of 2543555851 in words is "two billion, five hundred forty-three million, five hundred fifty-five thousand, eight hundred fifty-one".