82080521 has 4 divisors (see below), whose sum is σ = 82124544. Its totient is φ = 82036500.

The previous prime is 82080497. The next prime is 82080547. The reversal of 82080521 is 12508028.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 82080521 - 2¹⁸ = 81818377 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (82080571) 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, 19085 + ... + 22986.

It is an arithmetic number, because the mean of its divisors is an integer number (20531136).

Almost surely, 2^82080521 is an apocalyptic number.

It is an amenable number.

82080521 is a deficient number, since it is larger than the sum of its proper divisors (44023).

82080521 is a wasteful number, since it uses less digits than its factorization.

82080521 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 44022.

The product of its (nonzero) digits is 1280, while the sum is 26.

The square root of 82080521 is about 9059.8300756692. The cubic root of 82080521 is about 434.5903061183.

Adding to 82080521 its reverse (12508028), we get a palindrome (94588549).

The spelling of 82080521 in words is "eighty-two million, eighty thousand, five hundred twenty-one".