91314220 has 36 divisors (see below), whose sum is σ = 198186912. Its totient is φ = 35340000.

The previous prime is 91314217. The next prime is 91314221. The reversal of 91314220 is 2241319.

It is a junction number, because it is equal to n+sod(n) for n = 91314191 and 91314200.

It is not an unprimeable number, because it can be changed into a prime (91314221) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 16845 + ... + 21595.

It is an arithmetic number, because the mean of its divisors is an integer number (5505192).

Almost surely, 2^91314220 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 91314220, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (99093456).

91314220 is an abundant number, since it is smaller than the sum of its proper divisors (106872692).

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

91314220 is a wasteful number, since it uses less digits than its factorization.

91314220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4822 (or 4789 counting only the distinct ones).

The product of its (nonzero) digits is 432, while the sum is 22.

The square root of 91314220 is about 9555.8474244831. The cubic root of 91314220 is about 450.3112579092.

Adding to 91314220 its reverse (2241319), we get a palindrome (93555539).

The spelling of 91314220 in words is "ninety-one million, three hundred fourteen thousand, two hundred twenty".