81045050 has 24 divisors (see below), whose sum is σ = 151942656. Its totient is φ = 32160240.

The previous prime is 81045049. The next prime is 81045071. The reversal of 81045050 is 5054018.

It is a nialpdrome in base 14.

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 11 ways as a sum of consecutive naturals, for example, 32 + ... + 12731.

It is an arithmetic number, because the mean of its divisors is an integer number (6330944).

Almost surely, 2^81045050 is an apocalyptic number.

81045050 is a deficient number, since it is larger than the sum of its proper divisors (70897606).

81045050 is a wasteful number, since it uses less digits than its factorization.

81045050 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12902 (or 12897 counting only the distinct ones).

The product of its (nonzero) digits is 800, while the sum is 23.

The square root of 81045050 is about 9002.5024298803. The cubic root of 81045050 is about 432.7550702297.

Adding to 81045050 its reverse (5054018), we get a palindrome (86099068).

The spelling of 81045050 in words is "eighty-one million, forty-five thousand, fifty".