5205244387 has 4 divisors (see below), whose sum is σ = 5948850736. Its totient is φ = 4461638040.

The previous prime is 5205244381. The next prime is 5205244391. The reversal of 5205244387 is 7834425025.

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-5205244387 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (5205244381) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 371803164 + ... + 371803177.

It is an arithmetic number, because the mean of its divisors is an integer number (1487212684).

Almost surely, 2^5205244387 is an apocalyptic number.

5205244387 is a deficient number, since it is larger than the sum of its proper divisors (743606349).

5205244387 is an equidigital number, since it uses as much as digits as its factorization.

5205244387 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 743606348.

The product of its (nonzero) digits is 268800, while the sum is 40.

The square root of 5205244387 is about 72147.3796267058. The cubic root of 5205244387 is about 1733.0604371862.

The spelling of 5205244387 in words is "five billion, two hundred five million, two hundred forty-four thousand, three hundred eighty-seven".