2576240243 has 4 divisors (see below), whose sum is σ = 2583538728. Its totient is φ = 2568941760.

The previous prime is 2576240239. The next prime is 2576240273. The reversal of 2576240243 is 3420426752.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 2576240243 - 2² = 2576240239 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2576240203) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3648713 + ... + 3649418.

It is an arithmetic number, because the mean of its divisors is an integer number (645884682).

Almost surely, 2^2576240243 is an apocalyptic number.

2576240243 is a deficient number, since it is larger than the sum of its proper divisors (7298485).

2576240243 is an equidigital number, since it uses as much as digits as its factorization.

2576240243 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7298484.

The product of its (nonzero) digits is 80640, while the sum is 35.

The square root of 2576240243 is about 50756.6768317233. The cubic root of 2576240243 is about 1370.8674143449.

Adding to 2576240243 its reverse (3420426752), we get a palindrome (5996666995).

The spelling of 2576240243 in words is "two billion, five hundred seventy-six million, two hundred forty thousand, two hundred forty-three".