82131318 has 24 divisors (see below), whose sum is σ = 188419608. Its totient is φ = 25766592.

The previous prime is 82131317. The next prime is 82131341. The reversal of 82131318 is 81313128.

It is a junction number, because it is equal to n+sod(n) for n = 82131291 and 82131300.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (82131311) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 133896 + ... + 134507.

It is an arithmetic number, because the mean of its divisors is an integer number (7850817).

Almost surely, 2^82131318 is an apocalyptic number.

82131318 is an abundant number, since it is smaller than the sum of its proper divisors (106288290).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

82131318 is a wasteful number, since it uses less digits than its factorization.

82131318 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 268428 (or 268425 counting only the distinct ones).

The product of its digits is 1152, while the sum is 27.

The square root of 82131318 is about 9062.6330610921. The cubic root of 82131318 is about 434.6799389612.

The spelling of 82131318 in words is "eighty-two million, one hundred thirty-one thousand, three hundred eighteen".