81014085 has 12 divisors (see below), whose sum is σ = 140424492. Its totient is φ = 43207488.

The previous prime is 81014077. The next prime is 81014093. The reversal of 81014085 is 58041018.

It is an interprime number because it is at equal distance from previous prime (81014077) and next prime (81014093).

It can be written as a sum of positive squares in 2 ways, for example, as 40335201 + 40678884 = 6351^2 + 6378^2 .

It is not a de Polignac number, because 81014085 - 2³ = 81014077 is a prime.

It is a Smith number, since the sum of its digits (27) coincides with the sum of the digits of its prime factors.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 900112 + ... + 900201.

It is an arithmetic number, because the mean of its divisors is an integer number (11702041).

Almost surely, 2^81014085 is an apocalyptic number.

It is an amenable number.

81014085 is a deficient number, since it is larger than the sum of its proper divisors (59410407).

81014085 is a wasteful number, since it uses less digits than its factorization.

81014085 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1800324 (or 1800321 counting only the distinct ones).

The product of its (nonzero) digits is 1280, while the sum is 27.

The square root of 81014085 is about 9000.7824659859. The cubic root of 81014085 is about 432.6999487562.

The spelling of 81014085 in words is "eighty-one million, fourteen thousand, eighty-five".