5220806507251 has 4 divisors (see below), whose sum is σ = 5221068523792. Its totient is φ = 5220544490712.

The previous prime is 5220806507173. The next prime is 5220806507311. The reversal of 5220806507251 is 1527056080225.

5220806507251 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.

It is a cyclic number.

It is not a de Polignac number, because 5220806507251 - 2¹⁹ = 5220805982963 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 5220806507198 and 5220806507207.

It is not an unprimeable number, because it can be changed into a prime (5220806508251) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 130978380 + ... + 131018233.

It is an arithmetic number, because the mean of its divisors is an integer number (1305267130948).

Almost surely, 2^{5220806507251} is an apocalyptic number.

5220806507251 is a deficient number, since it is larger than the sum of its proper divisors (262016541).

5220806507251 is a wasteful number, since it uses less digits than its factorization.

5220806507251 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 262016540.

The product of its (nonzero) digits is 336000, while the sum is 43.

The spelling of 5220806507251 in words is "five trillion, two hundred twenty billion, eight hundred six million, five hundred seven thousand, two hundred fifty-one".