5247287257 has 4 divisors (see below), whose sum is σ = 5282504100. Its totient is φ = 5212070416.

The previous prime is 5247287249. The next prime is 5247287267. The reversal of 5247287257 is 7527827425.

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 1320886336 + 3926400921 = 36344^2 + 62661^2 .

It is a cyclic number.

It is not a de Polignac number, because 5247287257 - 2³ = 5247287249 is a prime.

It is a Smith number, since the sum of its digits (49) 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 self number, because there is not a number n which added to its sum of digits gives 5247287257.

It is not an unprimeable number, because it can be changed into a prime (5247287237) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 17608198 + ... + 17608495.

It is an arithmetic number, because the mean of its divisors is an integer number (1320626025).

Almost surely, 2^5247287257 is an apocalyptic number.

It is an amenable number.

5247287257 is a deficient number, since it is larger than the sum of its proper divisors (35216843).

5247287257 is a wasteful number, since it uses less digits than its factorization.

5247287257 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 35216842.

The product of its digits is 2195200, while the sum is 49.

The square root of 5247287257 is about 72438.1616069872. The cubic root of 5247287257 is about 1737.7139195371.

The spelling of 5247287257 in words is "five billion, two hundred forty-seven million, two hundred eighty-seven thousand, two hundred fifty-seven".