80842521 has 16 divisors (see below), whose sum is σ = 111814848. Its totient is φ = 51912000.

The previous prime is 80842519. The next prime is 80842523. The reversal of 80842521 is 12524808.

It is an interprime number because it is at equal distance from previous prime (80842519) and next prime (80842523).

It is not a de Polignac number, because 80842521 - 2¹ = 80842519 is a prime.

It is not an unprimeable number, because it can be changed into a prime (80842523) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 7606 + ... + 14816.

It is an arithmetic number, because the mean of its divisors is an integer number (6988428).

Almost surely, 2^80842521 is an apocalyptic number.

It is an amenable number.

80842521 is a deficient number, since it is larger than the sum of its proper divisors (30972327).

80842521 is a wasteful number, since it uses less digits than its factorization.

80842521 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7352.

The product of its (nonzero) digits is 5120, while the sum is 30.

The square root of 80842521 is about 8991.2469101899. The cubic root of 80842521 is about 432.3942891544.

The spelling of 80842521 in words is "eighty million, eight hundred forty-two thousand, five hundred twenty-one".