32256221 has 2 divisors, whose sum is σ = 32256222. Its totient is φ = 32256220.

The previous prime is 32256209. The next prime is 32256227. The reversal of 32256221 is 12265223.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 27144100 + 5112121 = 5210^2 + 2261^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-32256221 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (32256227) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 16128110 + 16128111.

It is an arithmetic number, because the mean of its divisors is an integer number (16128111).

Almost surely, 2^32256221 is an apocalyptic number.

It is an amenable number.

32256221 is a deficient number, since it is larger than the sum of its proper divisors (1).

32256221 is an equidigital number, since it uses as much as digits as its factorization.

32256221 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1440, while the sum is 23.

The square root of 32256221 is about 5679.4560478975. The cubic root of 32256221 is about 318.3253036238.

The spelling of 32256221 in words is "thirty-two million, two hundred fifty-six thousand, two hundred twenty-one".