91224160 has 48 divisors (see below), whose sum is σ = 216530496. Its totient is φ = 36318208.

The previous prime is 91224157. The next prime is 91224179. The reversal of 91224160 is 6142219.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 36057 + ... + 38503.

It is an arithmetic number, because the mean of its divisors is an integer number (4511052).

Almost surely, 2^91224160 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 91224160, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (108265248).

91224160 is an abundant number, since it is smaller than the sum of its proper divisors (125306336).

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

91224160 is a wasteful number, since it uses less digits than its factorization.

91224160 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2695 (or 2687 counting only the distinct ones).

The product of its (nonzero) digits is 864, while the sum is 25.

The square root of 91224160 is about 9551.1339640903. The cubic root of 91224160 is about 450.1631671669.

Adding to 91224160 its reverse (6142219), we get a palindrome (97366379).

The spelling of 91224160 in words is "ninety-one million, two hundred twenty-four thousand, one hundred sixty".