5215808641 has 4 divisors (see below), whose sum is σ = 5522620932. Its totient is φ = 4908996352.

The previous prime is 5215808567. The next prime is 5215808651. The reversal of 5215808641 is 1468085125.

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 4854048241 + 361760400 = 69671^2 + 19020^2 .

It is a cyclic number.

It is not a de Polignac number, because 5215808641 - 2⁷ = 5215808513 is a prime.

It is a Smith number, since the sum of its digits (40) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 5215808594 and 5215808603.

It is not an unprimeable number, because it can be changed into a prime (5215808651) 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, 153406120 + ... + 153406153.

It is an arithmetic number, because the mean of its divisors is an integer number (1380655233).

Almost surely, 2^5215808641 is an apocalyptic number.

It is an amenable number.

5215808641 is a deficient number, since it is larger than the sum of its proper divisors (306812291).

5215808641 is a wasteful number, since it uses less digits than its factorization.

5215808641 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 306812290.

The product of its (nonzero) digits is 76800, while the sum is 40.

The square root of 5215808641 is about 72220.5555295720. Note that the first 4 decimals coincide. The cubic root of 5215808641 is about 1734.2320836579.

The spelling of 5215808641 in words is "five billion, two hundred fifteen million, eight hundred eight thousand, six hundred forty-one".