5215090809 has 4 divisors (see below), whose sum is σ = 6953454416. Its totient is φ = 3476727204.

The previous prime is 5215090787. The next prime is 5215090849. The reversal of 5215090809 is 9080905125.

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 not a de Polignac number, because 5215090809 - 2⁷ = 5215090681 is a prime.

It is a super-2 number, since 2×5215090809² = 54394344292232548962, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (5215090849) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 869181799 + ... + 869181804.

It is an arithmetic number, because the mean of its divisors is an integer number (1738363604).

Almost surely, 2^5215090809 is an apocalyptic number.

It is an amenable number.

5215090809 is a deficient number, since it is larger than the sum of its proper divisors (1738363607).

5215090809 is a wasteful number, since it uses less digits than its factorization.

5215090809 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1738363606.

The product of its (nonzero) digits is 32400, while the sum is 39.

The square root of 5215090809 is about 72215.5856377278. The cubic root of 5215090809 is about 1734.1525214088.

The spelling of 5215090809 in words is "five billion, two hundred fifteen million, ninety thousand, eight hundred nine".