91242200 has 48 divisors (see below), whose sum is σ = 242447280. Its totient is φ = 31282560.

The previous prime is 91242197. The next prime is 91242233. The reversal of 91242200 is 224219.

It is a Harshad number since it is a multiple of its sum of digits (20).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 31187 + ... + 33986.

It is an arithmetic number, because the mean of its divisors is an integer number (5050985).

Almost surely, 2^91242200 is an apocalyptic number.

It is an amenable number.

91242200 is an abundant number, since it is smaller than the sum of its proper divisors (151205080).

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

91242200 is a wasteful number, since it uses less digits than its factorization.

91242200 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 65196 (or 65187 counting only the distinct ones).

The product of its (nonzero) digits is 288, while the sum is 20.

The square root of 91242200 is about 9552.0783078867. The cubic root of 91242200 is about 450.1928391612.

Adding to 91242200 its reverse (224219), we get a palindrome (91466419).

The spelling of 91242200 in words is "ninety-one million, two hundred forty-two thousand, two hundred".