81053005 has 16 divisors (see below), whose sum is σ = 107163648. Its totient is φ = 58360000.

The previous prime is 81052997. The next prime is 81053017. The reversal of 81053005 is 50035018.

It is not a de Polignac number, because 81053005 - 2³ = 81052997 is a prime.

It is a Duffinian number.

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, 1741 + ... + 12850.

It is an arithmetic number, because the mean of its divisors is an integer number (6697728).

Almost surely, 2^81053005 is an apocalyptic number.

It is an amenable number.

81053005 is a deficient number, since it is larger than the sum of its proper divisors (26110643).

81053005 is a wasteful number, since it uses less digits than its factorization.

81053005 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14708.

The product of its (nonzero) digits is 600, while the sum is 22.

The square root of 81053005 is about 9002.9442406359. The cubic root of 81053005 is about 432.7692288323.

The spelling of 81053005 in words is "eighty-one million, fifty-three thousand, five".