82512571 has 4 divisors (see below), whose sum is σ = 84431512. Its totient is φ = 80593632.

The previous prime is 82512539. The next prime is 82512581. The reversal of 82512571 is 17521528.

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 82512571 - 2⁵ = 82512539 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (82512581) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 959406 + ... + 959491.

It is an arithmetic number, because the mean of its divisors is an integer number (21107878).

Almost surely, 2^82512571 is an apocalyptic number.

82512571 is a deficient number, since it is larger than the sum of its proper divisors (1918941).

82512571 is a wasteful number, since it uses less digits than its factorization.

82512571 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1918940.

The product of its digits is 5600, while the sum is 31.

The square root of 82512571 is about 9083.6430467076. The cubic root of 82512571 is about 435.3514946506.

The spelling of 82512571 in words is "eighty-two million, five hundred twelve thousand, five hundred seventy-one".