80803521 has 8 divisors (see below), whose sum is σ = 119708960. Its totient is φ = 53868996.

The previous prime is 80803519. The next prime is 80803537. The reversal of 80803521 is 12530808.

It is a happy number.

It is not a de Polignac number, because 80803521 - 2¹ = 80803519 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (27), and also a Moran number because the ratio is a prime number: 2992723 = 80803521 / (8 + 0 + 8 + 0 + 3 + 5 + 2 + 1).

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (80883521) 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 7 ways as a sum of consecutive naturals, for example, 1496335 + ... + 1496388.

It is an arithmetic number, because the mean of its divisors is an integer number (14963620).

Almost surely, 2^80803521 is an apocalyptic number.

It is an amenable number.

80803521 is a deficient number, since it is larger than the sum of its proper divisors (38905439).

80803521 is a wasteful number, since it uses less digits than its factorization.

80803521 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2992732 (or 2992726 counting only the distinct ones).

The product of its (nonzero) digits is 1920, while the sum is 27.

The square root of 80803521 is about 8989.0778726185. The cubic root of 80803521 is about 432.3247461732.

The spelling of 80803521 in words is "eighty million, eight hundred three thousand, five hundred twenty-one".