32133221 has 2 divisors, whose sum is σ = 32133222. Its totient is φ = 32133220.

The previous prime is 32133209. The next prime is 32133239. The reversal of 32133221 is 12233123.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 31516996 + 616225 = 5614^2 + 785^2 .

It is a cyclic number.

It is not a de Polignac number, because 32133221 - 2¹⁰ = 32132197 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 32133221.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (32133821) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 16066610 + 16066611.

It is an arithmetic number, because the mean of its divisors is an integer number (16066611).

Almost surely, 2^32133221 is an apocalyptic number.

It is an amenable number.

32133221 is a deficient number, since it is larger than the sum of its proper divisors (1).

32133221 is an equidigital number, since it uses as much as digits as its factorization.

32133221 is an evil number, because the sum of its binary digits is even.

The product of its digits is 216, while the sum is 17.

The square root of 32133221 is about 5668.6172035162. The cubic root of 32133221 is about 317.9201736528.

Adding to 32133221 its reverse (12233123), we get a palindrome (44366344).

The spelling of 32133221 in words is "thirty-two million, one hundred thirty-three thousand, two hundred twenty-one".