82257571 has 4 divisors (see below), whose sum is σ = 89735544. Its totient is φ = 74779600.

The previous prime is 82257563. The next prime is 82257583. The reversal of 82257571 is 17575228.

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 82257571 - 2³ = 82257563 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 82257571.

It is not an unprimeable number, because it can be changed into a prime (82257541) 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, 3738970 + ... + 3738991.

It is an arithmetic number, because the mean of its divisors is an integer number (22433886).

Almost surely, 2^82257571 is an apocalyptic number.

82257571 is a deficient number, since it is larger than the sum of its proper divisors (7477973).

82257571 is a wasteful number, since it uses less digits than its factorization.

82257571 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7477972.

The product of its digits is 39200, while the sum is 37.

The square root of 82257571 is about 9069.5959667452. The cubic root of 82257571 is about 434.9025562330.

It can be divided in two parts, 82257 and 571, that added together give a palindrome (82828).

The spelling of 82257571 in words is "eighty-two million, two hundred fifty-seven thousand, five hundred seventy-one".