2543321400 has 96 divisors (see below), whose sum is σ = 7962548400. Its totient is φ = 671488000.

The previous prime is 2543321381. The next prime is 2543321401. The reversal of 2543321400 is 41233452.

It is a Harshad number since it is a multiple of its sum of digits (24).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2543321401) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 39616 + ... + 81584.

Almost surely, 2^2543321400 is an apocalyptic number.

2543321400 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 2543321400, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (3981274200).

2543321400 is an abundant number, since it is smaller than the sum of its proper divisors (5419227000).

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

2543321400 is a wasteful number, since it uses less digits than its factorization.

2543321400 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 42089 (or 42080 counting only the distinct ones).

The product of its (nonzero) digits is 2880, while the sum is 24.

The square root of 2543321400 is about 50431.3533429354. The cubic root of 2543321400 is about 1365.0034483134.

Adding to 2543321400 its reverse (41233452), we get a palindrome (2584554852).

The spelling of 2543321400 in words is "two billion, five hundred forty-three million, three hundred twenty-one thousand, four hundred".