2543031400 has 144 divisors (see below), whose sum is σ = 7407299340. Its totient is φ = 804787200.

The previous prime is 2543031391. The next prime is 2543031419. The reversal of 2543031400 is 41303452.

It can be written as a sum of positive squares in 6 ways, for example, as 1070467524 + 1472563876 = 32718^2 + 38374^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 117420 + ... + 137380.

Almost surely, 2^2543031400 is an apocalyptic number.

2543031400 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 2543031400, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (3703649670).

2543031400 is an abundant number, since it is smaller than the sum of its proper divisors (4864267940).

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

2543031400 is a wasteful number, since it uses less digits than its factorization.

2543031400 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20004 (or 19988 counting only the distinct ones).

The product of its (nonzero) digits is 1440, while the sum is 22.

The square root of 2543031400 is about 50428.4780654741. The cubic root of 2543031400 is about 1364.9515652330.

Adding to 2543031400 its reverse (41303452), we get a palindrome (2584334852).

The spelling of 2543031400 in words is "two billion, five hundred forty-three million, thirty-one thousand, four hundred".