81244482 has 48 divisors (see below), whose sum is σ = 182480256. Its totient is φ = 24085600.

The previous prime is 81244463. The next prime is 81244483. The reversal of 81244482 is 28444218.

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 (81244483) 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, 32932 + ... + 35312.

It is an arithmetic number, because the mean of its divisors is an integer number (3801672).

Almost surely, 2^81244482 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 81244482, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (91240128).

81244482 is an abundant number, since it is smaller than the sum of its proper divisors (101235774).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

81244482 is a wasteful number, since it uses less digits than its factorization.

81244482 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2455 (or 2444 counting only the distinct ones).

The product of its digits is 16384, while the sum is 33.

The square root of 81244482 is about 9013.5720998947. The cubic root of 81244482 is about 433.1097475103.

The spelling of 81244482 in words is "eighty-one million, two hundred forty-four thousand, four hundred eighty-two".