32221993 has 2 divisors, whose sum is σ = 32221994. Its totient is φ = 32221992.

The previous prime is 32221979. The next prime is 32222009. The reversal of 32221993 is 39912223.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 31775769 + 446224 = 5637^2 + 668^2 .

It is a cyclic number.

It is not a de Polignac number, because 32221993 - 2⁵ = 32221961 is a prime.

It is not a weakly prime, because it can be changed into another prime (32221393) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 16110996 + 16110997.

It is an arithmetic number, because the mean of its divisors is an integer number (16110997).

Almost surely, 2^32221993 is an apocalyptic number.

It is an amenable number.

32221993 is a deficient number, since it is larger than the sum of its proper divisors (1).

32221993 is an equidigital number, since it uses as much as digits as its factorization.

32221993 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 5832, while the sum is 31.

The square root of 32221993 is about 5676.4419313510. The cubic root of 32221993 is about 318.2126690754.

The spelling of 32221993 in words is "thirty-two million, two hundred twenty-one thousand, nine hundred ninety-three".