5191111 has 4 divisors (see below), whose sum is σ = 5196424. Its totient is φ = 5185800.

The previous prime is 5191099. The next prime is 5191129. The reversal of 5191111 is 1111915.

5191111 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is not a de Polignac number, because 5191111 - 2⁹ = 5190599 is a prime.

It is a Duffinian number.

5191111 is a modest number, since divided by 1111 gives 519 as remainder.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (5191141) 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, 720 + ... + 3301.

It is an arithmetic number, because the mean of its divisors is an integer number (1299106).

Almost surely, 2^5191111 is an apocalyptic number.

5191111 is a deficient number, since it is larger than the sum of its proper divisors (5313).

5191111 is a wasteful number, since it uses less digits than its factorization.

5191111 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5312.

The product of its digits is 45, while the sum is 19.

The square root of 5191111 is about 2278.4009743678. The cubic root of 5191111 is about 173.1490468233.

It can be divided in two parts, 5191 and 111, that multiplied together give a triangular number (576201 = T₁₀₇₃).

The spelling of 5191111 in words is "five million, one hundred ninety-one thousand, one hundred eleven".