82581259 has 4 divisors (see below), whose sum is σ = 82910520. Its totient is φ = 82252000.

The previous prime is 82581227. The next prime is 82581263. The reversal of 82581259 is 95218528.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 82581259 - 2⁵ = 82581227 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (82581269) 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, 164254 + ... + 164755.

It is an arithmetic number, because the mean of its divisors is an integer number (20727630).

Almost surely, 2^82581259 is an apocalyptic number.

82581259 is a deficient number, since it is larger than the sum of its proper divisors (329261).

82581259 is a wasteful number, since it uses less digits than its factorization.

82581259 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 329260.

The product of its digits is 57600, while the sum is 40.

The square root of 82581259 is about 9087.4231220957. The cubic root of 82581259 is about 435.4722646504.

The spelling of 82581259 in words is "eighty-two million, five hundred eighty-one thousand, two hundred fifty-nine".