81032528 has 10 divisors (see below), whose sum is σ = 157000554. Its totient is φ = 40516256.

The previous prime is 81032527. The next prime is 81032533. The reversal of 81032528 is 82523018.

It can be written as a sum of positive squares in only one way, i.e., 69689104 + 11343424 = 8348^2 + 3368^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 81032528.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (81032521) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2532251 + ... + 2532282.

Almost surely, 2^81032528 is an apocalyptic number.

It is an amenable number.

81032528 is a deficient number, since it is larger than the sum of its proper divisors (75968026).

81032528 is a wasteful number, since it uses less digits than its factorization.

81032528 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5064541 (or 5064535 counting only the distinct ones).

The product of its (nonzero) digits is 3840, while the sum is 29.

The square root of 81032528 is about 9001.8069297225. The cubic root of 81032528 is about 432.7327812349.

The spelling of 81032528 in words is "eighty-one million, thirty-two thousand, five hundred twenty-eight".