81050306 has 16 divisors (see below), whose sum is σ = 127630080. Its totient is φ = 38551440.

The previous prime is 81050297. The next prime is 81050309. The reversal of 81050306 is 60305018.

It is not an unprimeable number, because it can be changed into a prime (81050309) 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 7 ways as a sum of consecutive naturals, for example, 7421 + ... + 14736.

It is an arithmetic number, because the mean of its divisors is an integer number (7976880).

Almost surely, 2^81050306 is an apocalyptic number.

81050306 is a deficient number, since it is larger than the sum of its proper divisors (46579774).

81050306 is a wasteful number, since it uses less digits than its factorization.

81050306 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 22249.

The product of its (nonzero) digits is 720, while the sum is 23.

The square root of 81050306 is about 9002.7943439801. The cubic root of 81050306 is about 432.7644251563.

The spelling of 81050306 in words is "eighty-one million, fifty thousand, three hundred six".