5243520865 has 32 divisors (see below), whose sum is σ = 7000473600. Its totient is φ = 3738160320.

The previous prime is 5243520857. The next prime is 5243520889. The reversal of 5243520865 is 5680253425.

It is a happy number.

It is not a de Polignac number, because 5243520865 - 2³ = 5243520857 is a prime.

It is a super-2 number, since 2×5243520865² = 54989022123380696450, which contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 1240726 + ... + 1244944.

It is an arithmetic number, because the mean of its divisors is an integer number (218764800).

Almost surely, 2^5243520865 is an apocalyptic number.

5243520865 is a gapful number since it is divisible by the number (55) formed by its first and last digit.

It is an amenable number.

5243520865 is a deficient number, since it is larger than the sum of its proper divisors (1756952735).

5243520865 is a wasteful number, since it uses less digits than its factorization.

5243520865 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4677.

The product of its (nonzero) digits is 288000, while the sum is 40.

The square root of 5243520865 is about 72412.1596487772. The cubic root of 5243520865 is about 1737.2980552348.

The spelling of 5243520865 in words is "five billion, two hundred forty-three million, five hundred twenty thousand, eight hundred sixty-five".