82181345 has 8 divisors (see below), whose sum is σ = 99031680. Its totient is φ = 65469040.

The previous prime is 82181339. The next prime is 82181347. The reversal of 82181345 is 54318128.

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

It is not a de Polignac number, because 82181345 - 2⁸ = 82181089 is a prime.

It is not an unprimeable number, because it can be changed into a prime (82181347) 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, 33191 + ... + 35580.

It is an arithmetic number, because the mean of its divisors is an integer number (12378960).

Almost surely, 2^82181345 is an apocalyptic number.

It is an amenable number.

82181345 is a deficient number, since it is larger than the sum of its proper divisors (16850335).

82181345 is a wasteful number, since it uses less digits than its factorization.

82181345 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 69015.

The product of its digits is 7680, while the sum is 32.

The square root of 82181345 is about 9065.3927107434. The cubic root of 82181345 is about 434.7681770014.

The spelling of 82181345 in words is "eighty-two million, one hundred eighty-one thousand, three hundred forty-five".