81014385 has 16 divisors (see below), whose sum is σ = 136445760. Its totient is φ = 40933440.

The previous prime is 81014363. The next prime is 81014389. The reversal of 81014385 is 58341018.

It is not a de Polignac number, because 81014385 - 2⁶ = 81014321 is a prime.

It is an alternating number because its digits alternate between even and odd.

It is not an unprimeable number, because it can be changed into a prime (81014389) 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 15 ways as a sum of consecutive naturals, for example, 141846 + ... + 142415.

It is an arithmetic number, because the mean of its divisors is an integer number (8527860).

Almost surely, 2^81014385 is an apocalyptic number.

It is an amenable number.

81014385 is a deficient number, since it is larger than the sum of its proper divisors (55431375).

81014385 is a wasteful number, since it uses less digits than its factorization.

81014385 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 284288.

The product of its (nonzero) digits is 3840, while the sum is 30.

The square root of 81014385 is about 9000.7991311883. The cubic root of 81014385 is about 432.7004828602.

The spelling of 81014385 in words is "eighty-one million, fourteen thousand, three hundred eighty-five".