91228000281 has 64 divisors (see below), whose sum is σ = 140838297600. Its totient is φ = 51946790400.

The previous prime is 91228000271. The next prime is 91228000313. The reversal of 91228000281 is 18200082219.

It is not a de Polignac number, because 91228000281 - 2¹⁰ = 91227999257 is a prime.

It is a super-2 number, since 2×91228000281² (a number of 23 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (33).

It is not an unprimeable number, because it can be changed into a prime (91228000211) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 51862680 + ... + 51864438.

It is an arithmetic number, because the mean of its divisors is an integer number (2200598400).

Almost surely, 2^91228000281 is an apocalyptic number.

It is an amenable number.

91228000281 is a deficient number, since it is larger than the sum of its proper divisors (49610297319).

91228000281 is a wasteful number, since it uses less digits than its factorization.

91228000281 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2430.

The product of its (nonzero) digits is 4608, while the sum is 33.

The spelling of 91228000281 in words is "ninety-one billion, two hundred twenty-eight million, two hundred eighty-one", and thus it is an aban number.