5181591 has 8 divisors (see below), whose sum is σ = 7095664. Its totient is φ = 3360960.

The previous prime is 5181587. The next prime is 5181599. The reversal of 5181591 is 1951815.

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

It is not a de Polignac number, because 5181591 - 2² = 5181587 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (5181599) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 23230 + ... + 23451.

It is an arithmetic number, because the mean of its divisors is an integer number (886958).

Almost surely, 2^5181591 is an apocalyptic number.

5181591 is a deficient number, since it is larger than the sum of its proper divisors (1914073).

5181591 is a wasteful number, since it uses less digits than its factorization.

5181591 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 46721.

The product of its digits is 1800, while the sum is 30.

The square root of 5181591 is about 2276.3108311476. The cubic root of 5181591 is about 173.0431358016.

The spelling of 5181591 in words is "five million, one hundred eighty-one thousand, five hundred ninety-one".