80528531 has 4 divisors (see below), whose sum is σ = 82241952. Its totient is φ = 78815112.

The previous prime is 80528519. The next prime is 80528557. The reversal of 80528531 is 13582508.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 80528531 - 2⁶ = 80528467 is a prime.

It is a super-2 number, since 2×80528531² = 12969688610035922, which contains 22 as substring.

It is a Duffinian 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 3 ways as a sum of consecutive naturals, for example, 856640 + ... + 856733.

It is an arithmetic number, because the mean of its divisors is an integer number (20560488).

Almost surely, 2^80528531 is an apocalyptic number.

80528531 is a deficient number, since it is larger than the sum of its proper divisors (1713421).

80528531 is a wasteful number, since it uses less digits than its factorization.

80528531 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1713420.

The product of its (nonzero) digits is 9600, while the sum is 32.

The square root of 80528531 is about 8973.7690520762. The cubic root of 80528531 is about 431.8337605540.

The spelling of 80528531 in words is "eighty million, five hundred twenty-eight thousand, five hundred thirty-one".