82511511 has 16 divisors (see below), whose sum is σ = 115017216. Its totient is φ = 52515936.

The previous prime is 82511503. The next prime is 82511521. The reversal of 82511511 is 11511528.

It is not a de Polignac number, because 82511511 - 2³ = 82511503 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (82511521) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 56061 + ... + 57513.

It is an arithmetic number, because the mean of its divisors is an integer number (7188576).

Almost surely, 2^82511511 is an apocalyptic number.

82511511 is a deficient number, since it is larger than the sum of its proper divisors (32505705).

82511511 is a wasteful number, since it uses less digits than its factorization.

82511511 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2302.

The product of its digits is 400, while the sum is 24.

The square root of 82511511 is about 9083.5846998858. The cubic root of 82511511 is about 435.3496303910.

The spelling of 82511511 in words is "eighty-two million, five hundred eleven thousand, five hundred eleven".