81300814 has 32 divisors (see below), whose sum is σ = 146419200. Its totient is φ = 33102432.

The previous prime is 81300809. The next prime is 81300839. The reversal of 81300814 is 41800318.

It is a congruent number.

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, 51712 + ... + 53260.

It is an arithmetic number, because the mean of its divisors is an integer number (4575600).

Almost surely, 2^81300814 is an apocalyptic number.

81300814 is a deficient number, since it is larger than the sum of its proper divisors (65118386).

81300814 is a wasteful number, since it uses less digits than its factorization.

81300814 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1744.

The product of its (nonzero) digits is 768, while the sum is 25.

The square root of 81300814 is about 9016.6964016762. The cubic root of 81300814 is about 433.2098252878.

The spelling of 81300814 in words is "eighty-one million, three hundred thousand, eight hundred fourteen".