91224822 has 64 divisors (see below), whose sum is σ = 210651840. Its totient is φ = 26087424.

The previous prime is 91224817. The next prime is 91224827. The reversal of 91224822 is 22842219.

It is an interprime number because it is at equal distance from previous prime (91224817) and next prime (91224827).

It is a self number, because there is not a number n which added to its sum of digits gives 91224822.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (91224827) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 117628 + ... + 118400.

It is an arithmetic number, because the mean of its divisors is an integer number (3291435).

Almost surely, 2^91224822 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 91224822, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (105325920).

91224822 is an abundant number, since it is smaller than the sum of its proper divisors (119427018).

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

91224822 is a wasteful number, since it uses less digits than its factorization.

91224822 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 897.

The product of its digits is 4608, while the sum is 30.

The square root of 91224822 is about 9551.1686195983. The cubic root of 91224822 is about 450.1642560864.

The spelling of 91224822 in words is "ninety-one million, two hundred twenty-four thousand, eight hundred twenty-two".