82015911 has 12 divisors (see below), whose sum is σ = 119031640. Its totient is φ = 54416880.

The previous prime is 82015897. The next prime is 82015919. The reversal of 82015911 is 11951028.

It is not a de Polignac number, because 82015911 - 2⁶ = 82015847 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (82015919) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 19696 + ... + 23493.

Almost surely, 2^82015911 is an apocalyptic number.

82015911 is a deficient number, since it is larger than the sum of its proper divisors (37015729).

82015911 is a wasteful number, since it uses less digits than its factorization.

82015911 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 43406 (or 43403 counting only the distinct ones).

The product of its (nonzero) digits is 720, while the sum is 27.

The square root of 82015911 is about 9056.2636335301. The cubic root of 82015911 is about 434.4762463714.

Adding to 82015911 its reverse (11951028), we get a palindrome (93966939).

The spelling of 82015911 in words is "eighty-two million, fifteen thousand, nine hundred eleven".