32002161 has 4 divisors (see below), whose sum is σ = 42669552. Its totient is φ = 21334772.

The previous prime is 32002147. The next prime is 32002163. The reversal of 32002161 is 16120023.

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, and also an emirpimes, since its reverse is a distinct semiprime: 16120023 = 3 ⋅5373341.

It is a cyclic number.

It is not a de Polignac number, because 32002161 - 2⁵ = 32002129 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 32002161.

It is not an unprimeable number, because it can be changed into a prime (32002163) 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, 5333691 + ... + 5333696.

It is an arithmetic number, because the mean of its divisors is an integer number (10667388).

Almost surely, 2^32002161 is an apocalyptic number.

It is an amenable number.

32002161 is a deficient number, since it is larger than the sum of its proper divisors (10667391).

32002161 is a wasteful number, since it uses less digits than its factorization.

32002161 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10667390.

The product of its (nonzero) digits is 72, while the sum is 15.

The square root of 32002161 is about 5657.0452534870. The cubic root of 32002161 is about 317.4873568446.

Adding to 32002161 its reverse (16120023), we get a palindrome (48122184).

The spelling of 32002161 in words is "thirty-two million, two thousand, one hundred sixty-one".