5205822721 has 4 divisors (see below), whose sum is σ = 5679079344. Its totient is φ = 4732566100.

The previous prime is 5205822703. The next prime is 5205822731. The reversal of 5205822721 is 1272285025.

5205822721 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

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 5205822721 - 2³¹ = 3058339073 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (5205822731) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 236628295 + ... + 236628316.

It is an arithmetic number, because the mean of its divisors is an integer number (1419769836).

Almost surely, 2^5205822721 is an apocalyptic number.

It is an amenable number.

5205822721 is a deficient number, since it is larger than the sum of its proper divisors (473256623).

5205822721 is a wasteful number, since it uses less digits than its factorization.

5205822721 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 473256622.

The product of its (nonzero) digits is 22400, while the sum is 34.

The square root of 5205822721 is about 72151.3875195758. The cubic root of 5205822721 is about 1733.1246192932.

The spelling of 5205822721 in words is "five billion, two hundred five million, eight hundred twenty-two thousand, seven hundred twenty-one".