2543000000 has 98 divisors (see below), whose sum is σ = 6310231728. Its totient is φ = 1016800000.

The previous prime is 2542999981. The next prime is 2543000003. The reversal of 2543000000 is 3452.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2543000003) by changing a digit.

It is a polite number, since it can be written in 13 ways as a sum of consecutive naturals, for example, 998729 + ... + 1001271.

Almost surely, 2^2543000000 is an apocalyptic number.

2543000000 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 2543000000, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (3155115864).

2543000000 is an abundant number, since it is smaller than the sum of its proper divisors (3767231728).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

2543000000 is an frugal number, since it uses more digits than its factorization.

2543000000 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2585 (or 2550 counting only the distinct ones).

The product of its (nonzero) digits is 120, while the sum is 14.

The square root of 2543000000 is about 50428.1667324919. The cubic root of 2543000000 is about 1364.9459473110.

Adding to 2543000000 its reverse (3452), we get a palindrome (2543003452).

The spelling of 2543000000 in words is "two billion, five hundred forty-three million", and thus it is an aban number.