91518 has 16 divisors (see below), whose sum is σ = 209280. Its totient is φ = 26136.

The previous prime is 91513. The next prime is 91529. The reversal of 91518 is 81519.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (91513) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1048 + ... + 1131.

It is an arithmetic number, because the mean of its divisors is an integer number (13080).

2⁹¹⁵¹⁸ is an apocalyptic number.

91518 is an abundant number, since it is smaller than the sum of its proper divisors (117762).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

It is a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (104640).

91518 is a wasteful number, since it uses less digits than its factorization.

91518 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2191.

The product of its digits is 360, while the sum is 24.

The square root of 91518 is about 302.5194208642. The cubic root of 91518 is about 45.0645985808.

Subtracting from 91518 its reverse (81519), we obtain a palindrome (9999).

The spelling of 91518 in words is "ninety-one thousand, five hundred eighteen".