82381085 has 8 divisors (see below), whose sum is σ = 99370680. Its totient is φ = 65562624.

The previous prime is 82381081. The next prime is 82381097. The reversal of 82381085 is 58018328.

It can be written as a sum of positive squares in 4 ways, for example, as 2493241 + 79887844 = 1579^2 + 8938^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 82381085 - 2² = 82381081 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (82381081) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 41720 + ... + 43649.

It is an arithmetic number, because the mean of its divisors is an integer number (12421335).

Almost surely, 2^82381085 is an apocalyptic number.

It is an amenable number.

82381085 is a deficient number, since it is larger than the sum of its proper divisors (16989595).

82381085 is a wasteful number, since it uses less digits than its factorization.

82381085 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 85567.

The product of its (nonzero) digits is 15360, while the sum is 35.

The square root of 82381085 is about 9076.4026464233. The cubic root of 82381085 is about 435.1201236051.

The spelling of 82381085 in words is "eighty-two million, three hundred eighty-one thousand, eighty-five".