82528081 has 8 divisors (see below), whose sum is σ = 88158024. Its totient is φ = 76984320.

The previous prime is 82528067. The next prime is 82528087. The reversal of 82528081 is 18082528.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 9025 + 82519056 = 95^2 + 9084^2 .

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 82528081 - 2⁷ = 82527953 is a prime.

It is a super-2 number, since 2×82528081² = 13621768307085122, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (82528087) 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, 19560 + ... + 23401.

It is an arithmetic number, because the mean of its divisors is an integer number (11019753).

Almost surely, 2^82528081 is an apocalyptic number.

It is an amenable number.

82528081 is a deficient number, since it is larger than the sum of its proper divisors (5629943).

82528081 is a wasteful number, since it uses less digits than its factorization.

82528081 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 43091.

The product of its (nonzero) digits is 10240, while the sum is 34.

The square root of 82528081 is about 9084.4967389504. The cubic root of 82528081 is about 435.3787708122.

The spelling of 82528081 in words is "eighty-two million, five hundred twenty-eight thousand, eighty-one".