82381331 has 8 divisors (see below), whose sum is σ = 86296320. Its totient is φ = 78494152.

The previous prime is 82381319. The next prime is 82381367. The reversal of 82381331 is 13318328.

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 82381331 - 2²² = 78187027 is a prime.

It is a super-2 number, since 2×82381331² = 13573367394663122, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 82381294 and 82381303.

It is not an unprimeable number, because it can be changed into a prime (82381381) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 761 + ... + 12858.

It is an arithmetic number, because the mean of its divisors is an integer number (10787040).

Almost surely, 2^82381331 is an apocalyptic number.

82381331 is a deficient number, since it is larger than the sum of its proper divisors (3914989).

82381331 is a wasteful number, since it uses less digits than its factorization.

82381331 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13905.

The product of its digits is 3456, while the sum is 29.

The square root of 82381331 is about 9076.4161980376. The cubic root of 82381331 is about 435.1205567120.

Adding to 82381331 its reverse (13318328), we get a palindrome (95699659).

The spelling of 82381331 in words is "eighty-two million, three hundred eighty-one thousand, three hundred thirty-one".