5181191 has 2 divisors, whose sum is σ = 5181192. Its totient is φ = 5181190.

The previous prime is 5181173. The next prime is 5181217. The reversal of 5181191 is 1911815.

It is an a-pointer prime, because the next prime (5181217) can be obtained adding 5181191 to its sum of digits (26).

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 5181191 - 2¹⁴ = 5164807 is a prime.

It is a Sophie Germain prime.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 5181191.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (5181101) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2590595 + 2590596.

It is an arithmetic number, because the mean of its divisors is an integer number (2590596).

Almost surely, 2^5181191 is an apocalyptic number.

5181191 is a deficient number, since it is larger than the sum of its proper divisors (1).

5181191 is an equidigital number, since it uses as much as digits as its factorization.

5181191 is an evil number, because the sum of its binary digits is even.

The product of its digits is 360, while the sum is 26.

The square root of 5181191 is about 2276.2229679889. Note that the first 3 decimals coincide. The cubic root of 5181191 is about 173.0386829199.

The spelling of 5181191 in words is "five million, one hundred eighty-one thousand, one hundred ninety-one".