91515 has 8 divisors (see below), whose sum is σ = 146448. Its totient is φ = 48800.

The previous prime is 91513. The next prime is 91529. The reversal of 91515 is 51519.

It is a happy number.

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

It is not a de Polignac number, because 91515 - 2¹ = 91513 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 91491 and 91500.

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, 3036 + ... + 3065.

It is an arithmetic number, because the mean of its divisors is an integer number (18306).

2⁹¹⁵¹⁵ is an apocalyptic number.

91515 is a deficient number, since it is larger than the sum of its proper divisors (54933).

91515 is a wasteful number, since it uses less digits than its factorization.

91515 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6109.

The product of its digits is 225, while the sum is 21.

The square root of 91515 is about 302.5144624642. The cubic root of 91515 is about 45.0641061631.

It can be divided in two parts, 91 and 515, that added together give a palindrome (606).

The spelling of 91515 in words is "ninety-one thousand, five hundred fifteen".