91132500 has 120 divisors (see below), whose sum is σ = 275536800. Its totient is φ = 23408000.

The previous prime is 91132499. The next prime is 91132507. The reversal of 91132500 is 523119.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (91132507) 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 39 ways as a sum of consecutive naturals, for example, 217291 + ... + 217709.

It is an arithmetic number, because the mean of its divisors is an integer number (2296140).

Almost surely, 2^91132500 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 91132500, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (137768400).

91132500 is an abundant number, since it is smaller than the sum of its proper divisors (184404300).

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

91132500 is a wasteful number, since it uses less digits than its factorization.

91132500 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 475 (or 458 counting only the distinct ones).

The product of its (nonzero) digits is 270, while the sum is 21.

The square root of 91132500 is about 9546.3343750363. The cubic root of 91132500 is about 450.0123453403.

Adding to 91132500 its reverse (523119), we get a palindrome (91655619).

It can be divided in two parts, 911 and 32500, that added together give a triangular number (33411 = T₂₅₈).

The spelling of 91132500 in words is "ninety-one million, one hundred thirty-two thousand, five hundred".