5191312919 has 4 divisors (see below), whose sum is σ = 5590644696. Its totient is φ = 4791981144.

The previous prime is 5191312913. The next prime is 5191312963. The reversal of 5191312919 is 9192131915.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 9192131915 = 5 ⋅1838426383.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-5191312919 is a prime.

It is a super-2 number, since 2×5191312919² = 53899459645952601122, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (5191312913) 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, 199665869 + ... + 199665894.

It is an arithmetic number, because the mean of its divisors is an integer number (1397661174).

Almost surely, 2^5191312919 is an apocalyptic number.

5191312919 is a deficient number, since it is larger than the sum of its proper divisors (399331777).

5191312919 is a wasteful number, since it uses less digits than its factorization.

5191312919 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 399331776.

The product of its digits is 21870, while the sum is 41.

The square root of 5191312919 is about 72050.7662624070. The cubic root of 5191312919 is about 1731.5129179101.

The spelling of 5191312919 in words is "five billion, one hundred ninety-one million, three hundred twelve thousand, nine hundred nineteen".