91065552 has 20 divisors (see below), whose sum is σ = 235252800. Its totient is φ = 30355168.

The previous prime is 91065517. The next prime is 91065571. The reversal of 91065552 is 25556019.

It is a super-2 number, since 2×91065552² = 16585869522129408, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 948552 + ... + 948647.

It is an arithmetic number, because the mean of its divisors is an integer number (11762640).

Almost surely, 2^91065552 is an apocalyptic number.

It is an amenable number.

91065552 is an abundant number, since it is smaller than the sum of its proper divisors (144187248).

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

91065552 is a wasteful number, since it uses less digits than its factorization.

91065552 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1897210 (or 1897204 counting only the distinct ones).

The product of its (nonzero) digits is 13500, while the sum is 33.

The square root of 91065552 is about 9542.8272540165. The cubic root of 91065552 is about 449.9021219223.

The spelling of 91065552 in words is "ninety-one million, sixty-five thousand, five hundred fifty-two".