82671381 has 32 divisors (see below), whose sum is σ = 132491520. Its totient is φ = 50645952.

The previous prime is 82671359. The next prime is 82671397. The reversal of 82671381 is 18317628.

It is not a de Polignac number, because 82671381 - 2¹⁵ = 82638613 is a prime.

It is a super-2 number, since 2×82671381² = 13669114472894322, which contains 22 as substring.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (82671581) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 110896 + ... + 111638.

It is an arithmetic number, because the mean of its divisors is an integer number (4140360).

Almost surely, 2^82671381 is an apocalyptic number.

It is an amenable number.

82671381 is a deficient number, since it is larger than the sum of its proper divisors (49820139).

82671381 is a wasteful number, since it uses less digits than its factorization.

82671381 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1082 (or 1076 counting only the distinct ones).

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

The square root of 82671381 is about 9092.3803813963. The cubic root of 82671381 is about 435.6306192381.

The spelling of 82671381 in words is "eighty-two million, six hundred seventy-one thousand, three hundred eighty-one".