331254221 has 2 divisors, whose sum is σ = 331254222. Its totient is φ = 331254220.

The previous prime is 331254193. The next prime is 331254271. The reversal of 331254221 is 122452133.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 167055625 + 164198596 = 12925^2 + 12814^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-331254221 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 (331254271) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 165627110 + 165627111.

It is an arithmetic number, because the mean of its divisors is an integer number (165627111).

Almost surely, 2^331254221 is an apocalyptic number.

It is an amenable number.

331254221 is a deficient number, since it is larger than the sum of its proper divisors (1).

331254221 is an equidigital number, since it uses as much as digits as its factorization.

331254221 is an odious number, because the sum of its binary digits is odd.

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

The square root of 331254221 is about 18200.3906826200. The cubic root of 331254221 is about 691.9166907460.

The spelling of 331254221 in words is "three hundred thirty-one million, two hundred fifty-four thousand, two hundred twenty-one".