91224535331 has 4 divisors (see below), whose sum is σ = 92249530200. Its totient is φ = 90199540464.

The previous prime is 91224535277. The next prime is 91224535361. The reversal of 91224535331 is 13353542219.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 91224535331 - 2⁶ = 91224535267 is a prime.

It is a super-2 number, since 2×91224535331² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (91224535361) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 512497301 + ... + 512497478.

It is an arithmetic number, because the mean of its divisors is an integer number (23062382550).

Almost surely, 2^91224535331 is an apocalyptic number.

91224535331 is a deficient number, since it is larger than the sum of its proper divisors (1024994869).

91224535331 is a wasteful number, since it uses less digits than its factorization.

91224535331 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1024994868.

The product of its digits is 97200, while the sum is 38.

It can be divided in two parts, 91 and 224535331, that added together give a palindrome (224535422).

The spelling of 91224535331 in words is "ninety-one billion, two hundred twenty-four million, five hundred thirty-five thousand, three hundred thirty-one".