91055712 has 144 divisors (see below), whose sum is σ = 274252608. Its totient is φ = 26231040.

The previous prime is 91055687. The next prime is 91055759. The reversal of 91055712 is 21755019.

It is a super-2 number, since 2×91055712² = 16582285375653888, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 91055712.

It is a congruent number.

It is an unprimeable number.

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 23 ways as a sum of consecutive naturals, for example, 558543 + ... + 558705.

It is an arithmetic number, because the mean of its divisors is an integer number (1904532).

Almost surely, 2^91055712 is an apocalyptic number.

91055712 is a gapful number since it is divisible by the number (92) 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 91055712, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (137126304).

91055712 is an abundant number, since it is smaller than the sum of its proper divisors (183196896).

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

91055712 is a wasteful number, since it uses less digits than its factorization.

91055712 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 233 (or 202 counting only the distinct ones).

The product of its (nonzero) digits is 3150, while the sum is 30.

The square root of 91055712 is about 9542.3116696113. The cubic root of 91055712 is about 449.8859167593.

The spelling of 91055712 in words is "ninety-one million, fifty-five thousand, seven hundred twelve".