91543122 has 80 divisors (see below), whose sum is σ = 228742272. Its totient is φ = 27125280.

The previous prime is 91543099. The next prime is 91543129. The reversal of 91543122 is 22134519.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is not an unprimeable number, because it can be changed into a prime (91543129) by changing a digit.

It is a polite number, since it can be written in 39 ways as a sum of consecutive naturals, for example, 83208 + ... + 84300.

Almost surely, 2^91543122 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 91543122, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (114371136).

91543122 is an abundant number, since it is smaller than the sum of its proper divisors (137199150).

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

91543122 is a wasteful number, since it uses less digits than its factorization.

91543122 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1165 (or 1156 counting only the distinct ones).

The product of its digits is 2160, while the sum is 27.

The square root of 91543122 is about 9567.8169923970. The cubic root of 91543122 is about 450.6872166508.

The spelling of 91543122 in words is "ninety-one million, five hundred forty-three thousand, one hundred twenty-two".