5215312243 has 4 divisors (see below), whose sum is σ = 5226200640. Its totient is φ = 5204423848.

The previous prime is 5215312189. The next prime is 5215312247. The reversal of 5215312243 is 3422135125.

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

It is a cyclic number.

It is not a de Polignac number, because 5215312243 - 2²⁹ = 4678441331 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (5215312247) 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, 5443480 + ... + 5444437.

It is an arithmetic number, because the mean of its divisors is an integer number (1306550160).

Almost surely, 2^5215312243 is an apocalyptic number.

5215312243 is a deficient number, since it is larger than the sum of its proper divisors (10888397).

5215312243 is a wasteful number, since it uses less digits than its factorization.

5215312243 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10888396.

The product of its digits is 7200, while the sum is 28.

The square root of 5215312243 is about 72217.1187669516. The cubic root of 5215312243 is about 1734.1770652381.

Adding to 5215312243 its reverse (3422135125), we get a palindrome (8637447368).

The spelling of 5215312243 in words is "five billion, two hundred fifteen million, three hundred twelve thousand, two hundred forty-three".