2543365499 has 2 divisors, whose sum is σ = 2543365500. Its totient is φ = 2543365498.

The previous prime is 2543365481. The next prime is 2543365523. The reversal of 2543365499 is 9945633452.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 2543365499 - 2²⁰ = 2542316923 is a prime.

It is not a weakly prime, because it can be changed into another prime (2543365999) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1271682749 + 1271682750.

It is an arithmetic number, because the mean of its divisors is an integer number (1271682750).

Almost surely, 2^2543365499 is an apocalyptic number.

2543365499 is a deficient number, since it is larger than the sum of its proper divisors (1).

2543365499 is an equidigital number, since it uses as much as digits as its factorization.

2543365499 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 3499200, while the sum is 50.

The square root of 2543365499 is about 50431.7905591305. The cubic root of 2543365499 is about 1365.0113375954.

The spelling of 2543365499 in words is "two billion, five hundred forty-three million, three hundred sixty-five thousand, four hundred ninety-nine".