5051312891 has 4 divisors (see below), whose sum is σ = 5120509032. Its totient is φ = 4982116752.

The previous prime is 5051312881. The next prime is 5051312911. The reversal of 5051312891 is 1982131505.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 1982131505 = 5 ⋅396426301.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-5051312891 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (5051312801) 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, 34597961 + ... + 34598106.

It is an arithmetic number, because the mean of its divisors is an integer number (1280127258).

Almost surely, 2^5051312891 is an apocalyptic number.

5051312891 is a deficient number, since it is larger than the sum of its proper divisors (69196141).

5051312891 is an equidigital number, since it uses as much as digits as its factorization.

5051312891 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 69196140.

The product of its (nonzero) digits is 10800, while the sum is 35.

The square root of 5051312891 is about 71072.5888862929. The cubic root of 5051312891 is about 1715.8056366664.

The spelling of 5051312891 in words is "five billion, fifty-one million, three hundred twelve thousand, eight hundred ninety-one".