5121242751 has 4 divisors (see below), whose sum is σ = 6828323672. Its totient is φ = 3414161832.

The previous prime is 5121242723. The next prime is 5121242759. The reversal of 5121242751 is 1572421215.

It is a happy number.

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

It is not a de Polignac number, because 5121242751 - 2¹⁴ = 5121226367 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (5121242759) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 853540456 + ... + 853540461.

It is an arithmetic number, because the mean of its divisors is an integer number (1707080918).

Almost surely, 2^5121242751 is an apocalyptic number.

5121242751 is a deficient number, since it is larger than the sum of its proper divisors (1707080921).

5121242751 is a wasteful number, since it uses less digits than its factorization.

5121242751 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1707080920.

The product of its digits is 5600, while the sum is 30.

The square root of 5121242751 is about 71562.8587397122. The cubic root of 5121242751 is about 1723.6871900083.

Adding to 5121242751 its reverse (1572421215), we get a palindrome (6693663966).

The spelling of 5121242751 in words is "five billion, one hundred twenty-one million, two hundred forty-two thousand, seven hundred fifty-one".