32164021 has 2 divisors, whose sum is σ = 32164022. Its totient is φ = 32164020.

The previous prime is 32164007. The next prime is 32164079. The reversal of 32164021 is 12046123.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 26471025 + 5692996 = 5145^2 + 2386^2 .

It is an emirp because it is prime and its reverse (12046123) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 32164021 - 2²³ = 23775413 is a prime.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 32164021.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (32164001) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 16082010 + 16082011.

It is an arithmetic number, because the mean of its divisors is an integer number (16082011).

Almost surely, 2^32164021 is an apocalyptic number.

It is an amenable number.

32164021 is a deficient number, since it is larger than the sum of its proper divisors (1).

32164021 is an equidigital number, since it uses as much as digits as its factorization.

32164021 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 288, while the sum is 19.

The square root of 32164021 is about 5671.3332647624. Note that the first 3 decimals coincide. The cubic root of 32164021 is about 318.0217177262.

The spelling of 32164021 in words is "thirty-two million, one hundred sixty-four thousand, twenty-one".