91275552 has 96 divisors (see below), whose sum is σ = 269438400. Its totient is φ = 30057984.

The previous prime is 91275539. The next prime is 91275571. The reversal of 91275552 is 25557219.

It is a tau number, because it is divible by the number of its divisors (96).

It is a Harshad number since it is a multiple of its sum of digits (36).

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 76303 + ... + 77489.

It is an arithmetic number, because the mean of its divisors is an integer number (2806650).

Almost surely, 2^91275552 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 91275552, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (134719200).

91275552 is an abundant number, since it is smaller than the sum of its proper divisors (178162848).

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

91275552 is a wasteful number, since it uses less digits than its factorization.

91275552 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1295 (or 1281 counting only the distinct ones).

The product of its digits is 31500, while the sum is 36.

The square root of 91275552 is about 9553.8239464625. The cubic root of 91275552 is about 450.2476858677.

The spelling of 91275552 in words is "ninety-one million, two hundred seventy-five thousand, five hundred fifty-two".