131518 has 8 divisors (see below), whose sum is σ = 207720. Its totient is φ = 62280.

The previous prime is 131507. The next prime is 131519. The reversal of 131518 is 815131.

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

It is a Harshad number since it is a multiple of its sum of digits (19).

It is a junction number, because it is equal to n+sod(n) for n = 131495 and 131504.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (131519) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1693 + ... + 1768.

It is an arithmetic number, because the mean of its divisors is an integer number (25965).

2¹³¹⁵¹⁸ is an apocalyptic number.

131518 is a deficient number, since it is larger than the sum of its proper divisors (76202).

131518 is a wasteful number, since it uses less digits than its factorization.

131518 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3482.

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

The square root of 131518 is about 362.6541051746. The cubic root of 131518 is about 50.8543840671.

Adding to 131518 its reverse (815131), we get a palindrome (946649).

The spelling of 131518 in words is "one hundred thirty-one thousand, five hundred eighteen".