82507511 has 4 divisors (see below), whose sum is σ = 87360912. Its totient is φ = 77654112.

The previous prime is 82507471. The next prime is 82507517. The reversal of 82507511 is 11570528.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-82507511 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 (82507517) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2426675 + ... + 2426708.

It is an arithmetic number, because the mean of its divisors is an integer number (21840228).

Almost surely, 2^82507511 is an apocalyptic number.

82507511 is a deficient number, since it is larger than the sum of its proper divisors (4853401).

82507511 is a wasteful number, since it uses less digits than its factorization.

82507511 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4853400.

The product of its (nonzero) digits is 2800, while the sum is 29.

The square root of 82507511 is about 9083.3645198241. The cubic root of 82507511 is about 435.3425953053.

The spelling of 82507511 in words is "eighty-two million, five hundred seven thousand, five hundred eleven".