163082561 has 4 divisors (see below), whose sum is σ = 163118724. Its totient is φ = 163046400.

The previous prime is 163082539. The next prime is 163082587. The reversal of 163082561 is 165280361.

It is a happy number.

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

It can be written as a sum of positive squares in 2 ways, for example, as 96904336 + 66178225 = 9844^2 + 8135^2 .

It is a cyclic number.

It is not a de Polignac number, because 163082561 - 2⁶ = 163082497 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (163082501) 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, 10160 + ... + 20721.

It is an arithmetic number, because the mean of its divisors is an integer number (40779681).

Almost surely, 2^163082561 is an apocalyptic number.

It is an amenable number.

163082561 is a deficient number, since it is larger than the sum of its proper divisors (36163).

163082561 is an equidigital number, since it uses as much as digits as its factorization.

163082561 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 36162.

The product of its (nonzero) digits is 8640, while the sum is 32.

The square root of 163082561 is about 12770.3782637790. The cubic root of 163082561 is about 546.3477693833.

The spelling of 163082561 in words is "one hundred sixty-three million, eighty-two thousand, five hundred sixty-one".