5185811 has 2 divisors, whose sum is σ = 5185812. Its totient is φ = 5185810.

The previous prime is 5185801. The next prime is 5185813. The reversal of 5185811 is 1185815.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 5185811 - 2¹⁰ = 5184787 is a prime.

Together with 5185813, it forms a pair of twin primes.

It is a Chen prime.

It is a pancake number, because a pancake can be divided into 5185811 parts by 3220 straight cuts.

It is not a weakly prime, because it can be changed into another prime (5185813) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2592905 + 2592906.

It is an arithmetic number, because the mean of its divisors is an integer number (2592906).

Almost surely, 2^5185811 is an apocalyptic number.

5185811 is a deficient number, since it is larger than the sum of its proper divisors (1).

5185811 is an equidigital number, since it uses as much as digits as its factorization.

5185811 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1600, while the sum is 29.

The square root of 5185811 is about 2277.2375809300. The cubic root of 5185811 is about 173.0900997477.

It can be divided in two parts, 51 and 85811, that multiplied together give a triangular number (4376361 = T₂₉₅₈).

The spelling of 5185811 in words is "five million, one hundred eighty-five thousand, eight hundred eleven".