91325223 has 24 divisors (see below), whose sum is σ = 144218880. Its totient is φ = 55228560.

The previous prime is 91325219. The next prime is 91325233. The reversal of 91325223 is 32252319.

91325223 is a `hidden beast` number, since 9 + 132 + 522 + 3 = 666.

It is not a de Polignac number, because 91325223 - 2² = 91325219 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (91325233) by changing a digit.

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 23 ways as a sum of consecutive naturals, for example, 70540 + ... + 71822.

It is an arithmetic number, because the mean of its divisors is an integer number (6009120).

Almost surely, 2^91325223 is an apocalyptic number.

91325223 is a deficient number, since it is larger than the sum of its proper divisors (52893657).

91325223 is a wasteful number, since it uses less digits than its factorization.

91325223 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2019 (or 2016 counting only the distinct ones).

The product of its digits is 3240, while the sum is 27.

The square root of 91325223 is about 9556.4231279281. The cubic root of 91325223 is about 450.3293440874.

The spelling of 91325223 in words is "ninety-one million, three hundred twenty-five thousand, two hundred twenty-three".