518131 has 2 divisors, whose sum is σ = 518132. Its totient is φ = 518130.

The previous prime is 518129. The next prime is 518137. The reversal of 518131 is 131815.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 518131 - 2¹ = 518129 is a prime.

It is a super-2 number, since 2×518131² = 536919466322, which contains 22 as substring.

Together with 518129, it forms a pair of twin primes.

It is a zygodrome in base 2.

It is a junction number, because it is equal to n+sod(n) for n = 518099 and 518108.

It is not a weakly prime, because it can be changed into another prime (518137) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 259065 + 259066.

It is an arithmetic number, because the mean of its divisors is an integer number (259066).

2⁵¹⁸¹³¹ is an apocalyptic number.

518131 is a deficient number, since it is larger than the sum of its proper divisors (1).

518131 is an equidigital number, since it uses as much as digits as its factorization.

518131 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 120, while the sum is 19.

The square root of 518131 is about 719.8131702046. The cubic root of 518131 is about 80.3180567398.

Multiplying 518131 by its sum of digits (19), we get a palindrome (9844489).

Adding to 518131 its reverse (131815), we get a palindrome (649946).

The spelling of 518131 in words is "five hundred eighteen thousand, one hundred thirty-one".