84228581 has 16 divisors (see below), whose sum is σ = 89303040. Its totient is φ = 79334640.

The previous prime is 84228569. The next prime is 84228583. The reversal of 84228581 is 18582248.

It is a cyclic number.

It is not a de Polignac number, because 84228581 - 2²² = 80034277 is a prime.

It is a super-2 number, since 2×84228581² = 14188907714547122, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (84228583) 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 15 ways as a sum of consecutive naturals, for example, 222050 + ... + 222428.

It is an arithmetic number, because the mean of its divisors is an integer number (5581440).

Almost surely, 2^84228581 is an apocalyptic number.

It is an amenable number.

84228581 is a deficient number, since it is larger than the sum of its proper divisors (5074459).

84228581 is a wasteful number, since it uses less digits than its factorization.

84228581 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 584.

The product of its digits is 40960, while the sum is 38.

The square root of 84228581 is about 9177.6130338994. The cubic root of 84228581 is about 438.3488061286.

The spelling of 84228581 in words is "eighty-four million, two hundred twenty-eight thousand, five hundred eighty-one".