2543260321 has 4 divisors (see below), whose sum is σ = 2906583232. Its totient is φ = 2179937412.

The previous prime is 2543260277. The next prime is 2543260337. The reversal of 2543260321 is 1230623452.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 2543260321 - 2²¹ = 2541163169 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 2543260321.

It is not an unprimeable number, because it can be changed into a prime (2543263321) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 181661445 + ... + 181661458.

It is an arithmetic number, because the mean of its divisors is an integer number (726645808).

Almost surely, 2^2543260321 is an apocalyptic number.

It is an amenable number.

2543260321 is a deficient number, since it is larger than the sum of its proper divisors (363322911).

2543260321 is an equidigital number, since it uses as much as digits as its factorization.

2543260321 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 363322910.

The product of its (nonzero) digits is 8640, while the sum is 28.

The square root of 2543260321 is about 50430.7477735558. The cubic root of 2543260321 is about 1364.9925211700.

Adding to 2543260321 its reverse (1230623452), we get a palindrome (3773883773).

The spelling of 2543260321 in words is "two billion, five hundred forty-three million, two hundred sixty thousand, three hundred twenty-one".