91041216 has 84 divisors (see below), whose sum is σ = 280236168. Its totient is φ = 26009088.

The previous prime is 91041211. The next prime is 91041221. The reversal of 91041216 is 61214019.

It is an interprime number because it is at equal distance from previous prime (91041211) and next prime (91041221).

It is a tau number, because it is divible by the number of its divisors (84).

It is a Harshad number since it is a multiple of its sum of digits (24).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (91041211) 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 11 ways as a sum of consecutive naturals, for example, 4570 + ... + 14246.

Almost surely, 2^91041216 is an apocalyptic number.

91041216 is a gapful number since it is divisible by the number (96) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 91041216, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (140118084).

91041216 is an abundant number, since it is smaller than the sum of its proper divisors (189194952).

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

91041216 is a wasteful number, since it uses less digits than its factorization.

91041216 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9706 (or 9689 counting only the distinct ones).

The product of its (nonzero) digits is 432, while the sum is 24.

The square root of 91041216 is about 9541.5520750033. The cubic root of 91041216 is about 449.8620416605.

The spelling of 91041216 in words is "ninety-one million, forty-one thousand, two hundred sixteen".