5181999 has 8 divisors (see below), whose sum is σ = 6932400. Its totient is φ = 3443136.

The previous prime is 5181997. The next prime is 5182027. The reversal of 5181999 is 9991815.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 5181999 - 2¹ = 5181997 is a prime.

It is a super-2 number, since 2×5181999² = 53706227272002, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 5181999.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (5181997) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1774 + ... + 3675.

It is an arithmetic number, because the mean of its divisors is an integer number (866550).

Almost surely, 2^5181999 is an apocalyptic number.

5181999 is a deficient number, since it is larger than the sum of its proper divisors (1750401).

5181999 is a wasteful number, since it uses less digits than its factorization.

5181999 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5769.

The product of its digits is 29160, while the sum is 42.

The square root of 5181999 is about 2276.4004480759. The cubic root of 5181999 is about 173.0476775049.

The spelling of 5181999 in words is "five million, one hundred eighty-one thousand, nine hundred ninety-nine".