131018 has 8 divisors (see below), whose sum is σ = 198660. Its totient is φ = 64800.

The previous prime is 131011. The next prime is 131023. The reversal of 131018 is 810131.

It can be written as a sum of positive squares in 2 ways, for example, as 120409 + 10609 = 347^2 + 103^2 .

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

It is a junction number, because it is equal to n+sod(n) for n = 130993 and 131011.

It is not an unprimeable number, because it can be changed into a prime (131011) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 83 + ... + 518.

2¹³¹⁰¹⁸ is an apocalyptic number.

131018 is a deficient number, since it is larger than the sum of its proper divisors (67642).

131018 is a wasteful number, since it uses less digits than its factorization.

131018 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 712.

The product of its (nonzero) digits is 24, while the sum is 14.

The square root of 131018 is about 361.9640866163. The cubic root of 131018 is about 50.7898568212.

Adding to 131018 its reverse (810131), we get a palindrome (941149).

The spelling of 131018 in words is "one hundred thirty-one thousand, eighteen".