80603521 has 4 divisors (see below), whose sum is σ = 81054000. Its totient is φ = 80153044.

The previous prime is 80603507. The next prime is 80603527. The reversal of 80603521 is 12530608.

It is a happy number.

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 80603521 - 2⁹ = 80603009 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (80603527) 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 3 ways as a sum of consecutive naturals, for example, 224971 + ... + 225328.

It is an arithmetic number, because the mean of its divisors is an integer number (20263500).

Almost surely, 2^80603521 is an apocalyptic number.

It is an amenable number.

80603521 is a deficient number, since it is larger than the sum of its proper divisors (450479).

80603521 is a wasteful number, since it uses less digits than its factorization.

80603521 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 450478.

The product of its (nonzero) digits is 1440, while the sum is 25.

The square root of 80603521 is about 8977.9463687416. The cubic root of 80603521 is about 431.9677634410.

The spelling of 80603521 in words is "eighty million, six hundred three thousand, five hundred twenty-one".