82530561 has 4 divisors (see below), whose sum is σ = 110040752. Its totient is φ = 55020372.

The previous prime is 82530559. The next prime is 82530571. The reversal of 82530561 is 16503528.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is not a de Polignac number, because 82530561 - 2¹ = 82530559 is a prime.

It is a super-2 number, since 2×82530561² = 13622586997949442, which contains 22 as substring.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (82530541) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 13755091 + ... + 13755096.

It is an arithmetic number, because the mean of its divisors is an integer number (27510188).

Almost surely, 2^82530561 is an apocalyptic number.

It is an amenable number.

82530561 is a deficient number, since it is larger than the sum of its proper divisors (27510191).

82530561 is a wasteful number, since it uses less digits than its factorization.

82530561 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 27510190.

The product of its (nonzero) digits is 7200, while the sum is 30.

The square root of 82530561 is about 9084.6332342038. The cubic root of 82530561 is about 435.3831318673.

The spelling of 82530561 in words is "eighty-two million, five hundred thirty thousand, five hundred sixty-one".