5212406809 has 27 divisors (see below), whose sum is σ = 5656017087. Its totient is φ = 4803122016.

The previous prime is 5212406779. The next prime is 5212406833. The reversal of 5212406809 is 9086042125.

The square root of 5212406809 is 72197.

It is a perfect power (a square), and thus also a powerful number.

It can be written as a sum of positive squares in only one way, i.e., 2958816025 + 2253590784 = 54395^2 + 47472^2 .

It is not a de Polignac number, because 5212406809 - 2¹¹ = 5212404761 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (5212406879) by changing a digit.

It is a polite number, since it can be written in 26 ways as a sum of consecutive naturals, for example, 71402797 + ... + 71402869.

Almost surely, 2^5212406809 is an apocalyptic number.

5212406809 is the 72197-th square number.

5212406809 is the 36099-th centered octagonal number.

It is an amenable number.

5212406809 is a deficient number, since it is larger than the sum of its proper divisors (443610278).

5212406809 is an frugal number, since it uses more digits than its factorization.

5212406809 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 278 (or 139 counting only the distinct ones).

The product of its (nonzero) digits is 34560, while the sum is 37.

The cubic root of 5212406809 is about 1733.8549705604.

The spelling of 5212406809 in words is "five billion, two hundred twelve million, four hundred six thousand, eight hundred nine".