91245216 has 48 divisors (see below), whose sum is σ = 241164000. Its totient is φ = 30206208.

The previous prime is 91245199. The next prime is 91245227. The reversal of 91245216 is 61254219.

It is a tau number, because it is divible by the number of its divisors (48).

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, 11115 + ... + 17493.

It is an arithmetic number, because the mean of its divisors is an integer number (5024250).

Almost surely, 2^91245216 is an apocalyptic number.

91245216 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 91245216, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (120582000).

91245216 is an abundant number, since it is smaller than the sum of its proper divisors (149918784).

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

91245216 is a wasteful number, since it uses less digits than its factorization.

91245216 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6541 (or 6533 counting only the distinct ones).

The product of its digits is 4320, while the sum is 30.

The square root of 91245216 is about 9552.2361779847. The cubic root of 91245216 is about 450.1977994634.

The spelling of 91245216 in words is "ninety-one million, two hundred forty-five thousand, two hundred sixteen".