81334722 has 32 divisors (see below), whose sum is σ = 189868032. Its totient is φ = 22743504.

The previous prime is 81334709. The next prime is 81334723. The reversal of 81334722 is 22743318.

It is a self number, because there is not a number n which added to its sum of digits gives 81334722.

It is not an unprimeable number, because it can be changed into a prime (81334723) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 18628 + ... + 22575.

It is an arithmetic number, because the mean of its divisors is an integer number (5933376).

Almost surely, 2^81334722 is an apocalyptic number.

81334722 is an abundant number, since it is smaller than the sum of its proper divisors (108533310).

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

81334722 is a wasteful number, since it uses less digits than its factorization.

81334722 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 41262.

The product of its digits is 8064, while the sum is 30.

The square root of 81334722 is about 9018.5764952125. The cubic root of 81334722 is about 433.2700429591.

The spelling of 81334722 in words is "eighty-one million, three hundred thirty-four thousand, seven hundred twenty-two".