2543505401 has 2 divisors, whose sum is σ = 2543505402. Its totient is φ = 2543505400.

The previous prime is 2543505379. The next prime is 2543505403. The reversal of 2543505401 is 1045053452.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 2197359376 + 346146025 = 46876^2 + 18605^2 .

It is a cyclic number.

It is not a de Polignac number, because 2543505401 - 2¹⁸ = 2543243257 is a prime.

Together with 2543505403, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (2543505403) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1271752700 + 1271752701.

It is an arithmetic number, because the mean of its divisors is an integer number (1271752701).

Almost surely, 2^2543505401 is an apocalyptic number.

It is an amenable number.

2543505401 is a deficient number, since it is larger than the sum of its proper divisors (1).

2543505401 is an equidigital number, since it uses as much as digits as its factorization.

2543505401 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 12000, while the sum is 29.

The square root of 2543505401 is about 50433.1775818260. The cubic root of 2543505401 is about 1365.0363653673.

Adding to 2543505401 its reverse (1045053452), we get a palindrome (3588558853).

The spelling of 2543505401 in words is "two billion, five hundred forty-three million, five hundred five thousand, four hundred one".