82716381 has 48 divisors (see below), whose sum is σ = 137928960. Its totient is φ = 47295360.

The previous prime is 82716343. The next prime is 82716383. The reversal of 82716381 is 18361728.

82716381 is a `hidden beast` number, since 8 + 271 + 6 + 381 = 666.

It is not a de Polignac number, because 82716381 - 2¹⁰ = 82715357 is a prime.

It is a super-2 number, since 2×82716381² = 13683999371474322, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (82716383) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 134631 + ... + 135243.

It is an arithmetic number, because the mean of its divisors is an integer number (2873520).

Almost surely, 2^82716381 is an apocalyptic number.

It is an amenable number.

82716381 is a deficient number, since it is larger than the sum of its proper divisors (55212579).

82716381 is a wasteful number, since it uses less digits than its factorization.

82716381 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 706 (or 703 counting only the distinct ones).

The product of its digits is 16128, while the sum is 36.

The square root of 82716381 is about 9094.8546442480. The cubic root of 82716381 is about 435.7096462720.

The spelling of 82716381 in words is "eighty-two million, seven hundred sixteen thousand, three hundred eighty-one".