5211223009 has 4 divisors (see below), whose sum is σ = 5211436804. Its totient is φ = 5211009216.

The previous prime is 5211223001. The next prime is 5211223049. The reversal of 5211223009 is 9003221125.

It is a happy number.

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 1211040000 + 4000183009 = 34800^2 + 63247^2 .

It is a cyclic number.

It is not a de Polignac number, because 5211223009 - 2³ = 5211223001 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (5211223001) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 64812 + ... + 120925.

It is an arithmetic number, because the mean of its divisors is an integer number (1302859201).

Almost surely, 2^5211223009 is an apocalyptic number.

It is an amenable number.

5211223009 is a deficient number, since it is larger than the sum of its proper divisors (213795).

5211223009 is a wasteful number, since it uses less digits than its factorization.

5211223009 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 213794.

The product of its (nonzero) digits is 1080, while the sum is 25.

The square root of 5211223009 is about 72188.8011328627. The cubic root of 5211223009 is about 1733.7237008805.

The spelling of 5211223009 in words is "five billion, two hundred eleven million, two hundred twenty-three thousand, nine".