80820543 has 8 divisors (see below), whose sum is σ = 110673328. Its totient is φ = 52424064.

The previous prime is 80820541. The next prime is 80820611. The reversal of 80820543 is 34502808.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 80820543 - 2¹ = 80820541 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 80820543.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (80820541) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 363946 + ... + 364167.

It is an arithmetic number, because the mean of its divisors is an integer number (13834166).

Almost surely, 2^80820543 is an apocalyptic number.

80820543 is a deficient number, since it is larger than the sum of its proper divisors (29852785).

80820543 is a wasteful number, since it uses less digits than its factorization.

80820543 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 728153.

The product of its (nonzero) digits is 7680, while the sum is 30.

The square root of 80820543 is about 8990.0246384534. The cubic root of 80820543 is about 432.3551017611.

The spelling of 80820543 in words is "eighty million, eight hundred twenty thousand, five hundred forty-three".