82167281 has 8 divisors (see below), whose sum is σ = 96089664. Its totient is φ = 68790960.

The previous prime is 82167271. The next prime is 82167287. The reversal of 82167281 is 18276128.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 82167281 - 2¹⁰ = 82166257 is a prime.

It is a super-2 number, since 2×82167281² = 13502924133865922, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (82167287) 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, 136190 + ... + 136791.

It is an arithmetic number, because the mean of its divisors is an integer number (12011208).

Almost surely, 2^82167281 is an apocalyptic number.

It is an amenable number.

82167281 is a deficient number, since it is larger than the sum of its proper divisors (13922383).

82167281 is a wasteful number, since it uses less digits than its factorization.

82167281 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 273031.

The product of its digits is 10752, while the sum is 35.

The square root of 82167281 is about 9064.6169803252. The cubic root of 82167281 is about 434.7433744201.

The spelling of 82167281 in words is "eighty-two million, one hundred sixty-seven thousand, two hundred eighty-one".