80871525 has 36 divisors (see below), whose sum is σ = 165545952. Its totient is φ = 36969120.

The previous prime is 80871521. The next prime is 80871551. The reversal of 80871525 is 52517808.

It is not a de Polignac number, because 80871525 - 2² = 80871521 is a prime.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 80871525.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (80871521) by changing a digit.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 24099 + ... + 27248.

Almost surely, 2^80871525 is an apocalyptic number.

It is an amenable number.

80871525 is an abundant number, since it is smaller than the sum of its proper divisors (84674427).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

80871525 is a wasteful number, since it uses less digits than its factorization.

80871525 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 51370 (or 51362 counting only the distinct ones).

The product of its (nonzero) digits is 22400, while the sum is 36.

The square root of 80871525 is about 8992.8596675362. The cubic root of 80871525 is about 432.4459932341.

The spelling of 80871525 in words is "eighty million, eight hundred seventy-one thousand, five hundred twenty-five".