82581895 has 16 divisors (see below), whose sum is σ = 109009440. Its totient is φ = 60054720.

The previous prime is 82581893. The next prime is 82581899. The reversal of 82581895 is 59818528.

It is not a de Polignac number, because 82581895 - 2¹ = 82581893 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (82581893) 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 15 ways as a sum of consecutive naturals, for example, 451 + ... + 12859.

It is an arithmetic number, because the mean of its divisors is an integer number (6813090).

Almost surely, 2^82581895 is an apocalyptic number.

82581895 is a deficient number, since it is larger than the sum of its proper divisors (26427545).

82581895 is a wasteful number, since it uses less digits than its factorization.

82581895 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12447 (or 12425 counting only the distinct ones).

The product of its digits is 230400, while the sum is 46.

The square root of 82581895 is about 9087.4581154468. The cubic root of 82581895 is about 435.4733825782.

It can be divided in two parts, 8258 and 1895, that added together give a triangular number (10153 = T₁₄₂).

The spelling of 82581895 in words is "eighty-two million, five hundred eighty-one thousand, eight hundred ninety-five".