80528581 has 8 divisors (see below), whose sum is σ = 92401344. Its totient is φ = 68748000.

The previous prime is 80528579. The next prime is 80528611. The reversal of 80528581 is 18582508.

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

It is a cyclic number.

It is not a de Polignac number, because 80528581 - 2¹ = 80528579 is a prime.

It is a super-2 number, since 2×80528581² = 12969704715747122, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 80528581.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (80528501) 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, 21160 + ... + 24673.

It is an arithmetic number, because the mean of its divisors is an integer number (11550168).

Almost surely, 2^80528581 is an apocalyptic number.

It is an amenable number.

80528581 is a deficient number, since it is larger than the sum of its proper divisors (11872763).

80528581 is a wasteful number, since it uses less digits than its factorization.

80528581 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 46091.

The product of its (nonzero) digits is 25600, while the sum is 37.

The square root of 80528581 is about 8973.7718379731. The cubic root of 80528581 is about 431.8338499289.

The spelling of 80528581 in words is "eighty million, five hundred twenty-eight thousand, five hundred eighty-one".