82305181 has 8 divisors (see below), whose sum is σ = 94400064. Its totient is φ = 70294560.

The previous prime is 82305151. The next prime is 82305187. The reversal of 82305181 is 18150328.

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

It is not a de Polignac number, because 82305181 - 2¹³ = 82296989 is a prime.

It is a super-2 number, since 2×82305181² = 13548285638885522, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (82305187) 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, 18955 + ... + 22888.

It is an arithmetic number, because the mean of its divisors is an integer number (11800008).

Almost surely, 2^82305181 is an apocalyptic number.

It is an amenable number.

82305181 is a deficient number, since it is larger than the sum of its proper divisors (12094883).

82305181 is a wasteful number, since it uses less digits than its factorization.

82305181 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 42131.

The product of its (nonzero) digits is 1920, while the sum is 28.

The square root of 82305181 is about 9072.2202905353. The cubic root of 82305181 is about 434.9864460479.

The spelling of 82305181 in words is "eighty-two million, three hundred five thousand, one hundred eighty-one".