5165840243 has 4 divisors (see below), whose sum is σ = 5175115200. Its totient is φ = 5156565288.

The previous prime is 5165840191. The next prime is 5165840249. The reversal of 5165840243 is 3420485615.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-5165840243 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 5165840197 and 5165840206.

It is not an unprimeable number, because it can be changed into a prime (5165840249) 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, 4636643 + ... + 4637756.

It is an arithmetic number, because the mean of its divisors is an integer number (1293778800).

Almost surely, 2^5165840243 is an apocalyptic number.

5165840243 is a deficient number, since it is larger than the sum of its proper divisors (9274957).

5165840243 is an equidigital number, since it uses as much as digits as its factorization.

5165840243 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9274956.

The product of its (nonzero) digits is 115200, while the sum is 38.

The square root of 5165840243 is about 71873.7799409493. The cubic root of 5165840243 is about 1728.6762170868.

The spelling of 5165840243 in words is "five billion, one hundred sixty-five million, eight hundred forty thousand, two hundred forty-three".