91565229 has 16 divisors (see below), whose sum is σ = 139812480. Its totient is φ = 52216320.

The previous prime is 91565219. The next prime is 91565233. The reversal of 91565229 is 92256519.

It is not a de Polignac number, because 91565229 - 2⁵ = 91565197 is a prime.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (91565219) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 6757 + ... + 15125.

It is an arithmetic number, because the mean of its divisors is an integer number (8738280).

Almost surely, 2^91565229 is an apocalyptic number.

It is an amenable number.

91565229 is a deficient number, since it is larger than the sum of its proper divisors (48247251).

91565229 is a wasteful number, since it uses less digits than its factorization.

91565229 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8900.

The product of its digits is 48600, while the sum is 39.

The square root of 91565229 is about 9568.9722018616. The cubic root of 91565229 is about 450.7234929621.

The spelling of 91565229 in words is "ninety-one million, five hundred sixty-five thousand, two hundred twenty-nine".