91200512 has 132 divisors (see below), whose sum is σ = 215770176. Its totient is φ = 38338560.

The previous prime is 91200511. The next prime is 91200547. The reversal of 91200512 is 21500219.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (91200511) 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, 2941937 + ... + 2941967.

Almost surely, 2^91200512 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 91200512, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (107885088).

91200512 is an abundant number, since it is smaller than the sum of its proper divisors (124569664).

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

91200512 is a wasteful number, since it uses less digits than its factorization.

91200512 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 94 (or 63 counting only the distinct ones).

The product of its (nonzero) digits is 180, while the sum is 20.

The square root of 91200512 is about 9549.8959156632. The cubic root of 91200512 is about 450.1242652701.

The spelling of 91200512 in words is "ninety-one million, two hundred thousand, five hundred twelve".