81044722 has 32 divisors (see below), whose sum is σ = 136116288. Its totient is φ = 35880000.

The previous prime is 81044699. The next prime is 81044731. The reversal of 81044722 is 22744018.

It is an unprimeable number.

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, 175572 + ... + 176032.

It is an arithmetic number, because the mean of its divisors is an integer number (4253634).

Almost surely, 2^81044722 is an apocalyptic number.

81044722 is a deficient number, since it is larger than the sum of its proper divisors (55071566).

81044722 is a wasteful number, since it uses less digits than its factorization.

81044722 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 666.

The product of its (nonzero) digits is 3584, while the sum is 28.

The square root of 81044722 is about 9002.4842127048. The cubic root of 81044722 is about 432.7544864234.

The spelling of 81044722 in words is "eighty-one million, forty-four thousand, seven hundred twenty-two".