82181316 has 24 divisors (see below), whose sum is σ = 219150400. Its totient is φ = 23480352.

The previous prime is 82181291. The next prime is 82181317. The reversal of 82181316 is 61318128.

It is not an unprimeable number, because it can be changed into a prime (82181317) 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, 489091 + ... + 489258.

Almost surely, 2^82181316 is an apocalyptic number.

It is an amenable number.

82181316 is an abundant number, since it is smaller than the sum of its proper divisors (136969084).

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

82181316 is a wasteful number, since it uses less digits than its factorization.

82181316 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 978363 (or 978361 counting only the distinct ones).

The product of its digits is 2304, while the sum is 30.

The square root of 82181316 is about 9065.3911112538. The cubic root of 82181316 is about 434.7681258613.

The spelling of 82181316 in words is "eighty-two million, one hundred eighty-one thousand, three hundred sixteen".