82560161 has 4 divisors (see below), whose sum is σ = 85223424. Its totient is φ = 79896900.

The previous prime is 82560157. The next prime is 82560169. The reversal of 82560161 is 16106528.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 82560161 - 2² = 82560157 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (82560169) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1331585 + ... + 1331646.

It is an arithmetic number, because the mean of its divisors is an integer number (21305856).

Almost surely, 2^82560161 is an apocalyptic number.

82560161 is the 4064-th centered decagonal number.

It is an amenable number.

82560161 is a deficient number, since it is larger than the sum of its proper divisors (2663263).

82560161 is a wasteful number, since it uses less digits than its factorization.

82560161 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2663262.

The product of its (nonzero) digits is 2880, while the sum is 29.

The square root of 82560161 is about 9086.2622128134. The cubic root of 82560161 is about 435.4351764277.

Adding to 82560161 its reverse (16106528), we get a palindrome (98666689).

The spelling of 82560161 in words is "eighty-two million, five hundred sixty thousand, one hundred sixty-one".