5215778751 has 4 divisors (see below), whose sum is σ = 6954371672. Its totient is φ = 3477185832.

The previous prime is 5215778719. The next prime is 5215778759. The reversal of 5215778751 is 1578775125.

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

It is not a de Polignac number, because 5215778751 - 2⁵ = 5215778719 is a prime.

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 5215778751.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (5215778759) 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, 869296456 + ... + 869296461.

It is an arithmetic number, because the mean of its divisors is an integer number (1738592918).

Almost surely, 2^5215778751 is an apocalyptic number.

5215778751 is a deficient number, since it is larger than the sum of its proper divisors (1738592921).

5215778751 is a wasteful number, since it uses less digits than its factorization.

5215778751 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1738592920.

The product of its digits is 686000, while the sum is 48.

The square root of 5215778751 is about 72220.3485937308. The cubic root of 5215778751 is about 1734.2287708897.

The spelling of 5215778751 in words is "five billion, two hundred fifteen million, seven hundred seventy-eight thousand, seven hundred fifty-one".