32940221 has 2 divisors, whose sum is σ = 32940222. Its totient is φ = 32940220.

The previous prime is 32940217. The next prime is 32940223. The reversal of 32940221 is 12204923.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 23174596 + 9765625 = 4814^2 + 3125^2 .

It is a cyclic number.

It is not a de Polignac number, because 32940221 - 2² = 32940217 is a prime.

Together with 32940223, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (32940223) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 16470110 + 16470111.

It is an arithmetic number, because the mean of its divisors is an integer number (16470111).

Almost surely, 2^32940221 is an apocalyptic number.

It is an amenable number.

32940221 is a deficient number, since it is larger than the sum of its proper divisors (1).

32940221 is an equidigital number, since it uses as much as digits as its factorization.

32940221 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 864, while the sum is 23.

The square root of 32940221 is about 5739.3571939722. The cubic root of 32940221 is about 320.5596359376.

The spelling of 32940221 in words is "thirty-two million, nine hundred forty thousand, two hundred twenty-one".