5256536321 has 4 divisors (see below), whose sum is σ = 5274477012. Its totient is φ = 5238595632.

The previous prime is 5256536309. The next prime is 5256536339. The reversal of 5256536321 is 1236356525.

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

It can be written as a sum of positive squares in 2 ways, for example, as 3857776321 + 1398760000 = 62111^2 + 37400^2 .

It is a cyclic number.

It is not a de Polignac number, because 5256536321 - 2¹⁴ = 5256519937 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (5256536521) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 8969906 + ... + 8970491.

It is an arithmetic number, because the mean of its divisors is an integer number (1318619253).

Almost surely, 2^5256536321 is an apocalyptic number.

It is an amenable number.

5256536321 is a deficient number, since it is larger than the sum of its proper divisors (17940691).

5256536321 is a wasteful number, since it uses less digits than its factorization.

5256536321 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17940690.

The product of its digits is 162000, while the sum is 38.

The square root of 5256536321 is about 72501.9746006962. The cubic root of 5256536321 is about 1738.7343066779.

The spelling of 5256536321 in words is "five billion, two hundred fifty-six million, five hundred thirty-six thousand, three hundred twenty-one".