2543400203 has 2 divisors, whose sum is σ = 2543400204. Its totient is φ = 2543400202.

The previous prime is 2543400193. The next prime is 2543400221. The reversal of 2543400203 is 3020043452.

2543400203 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-2543400203 is a prime.

It is not a weakly prime, because it can be changed into another prime (2543400103) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1271700101 + 1271700102.

It is an arithmetic number, because the mean of its divisors is an integer number (1271700102).

Almost surely, 2^2543400203 is an apocalyptic number.

2543400203 is a deficient number, since it is larger than the sum of its proper divisors (1).

2543400203 is an equidigital number, since it uses as much as digits as its factorization.

2543400203 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 2880, while the sum is 23.

The square root of 2543400203 is about 50432.1346266445. The cubic root of 2543400203 is about 1365.0175460540.

Adding to 2543400203 its reverse (3020043452), we get a palindrome (5563443655).

The spelling of 2543400203 in words is "two billion, five hundred forty-three million, four hundred thousand, two hundred three".