50331221 has 2 divisors, whose sum is σ = 50331222. Its totient is φ = 50331220.

The previous prime is 50331187. The next prime is 50331227. The reversal of 50331221 is 12213305.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 46430596 + 3900625 = 6814^2 + 1975^2 .

It is a cyclic number.

It is not a de Polignac number, because 50331221 - 2²² = 46136917 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 50331221.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (50331227) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 25165610 + 25165611.

It is an arithmetic number, because the mean of its divisors is an integer number (25165611).

Almost surely, 2^50331221 is an apocalyptic number.

It is an amenable number.

50331221 is a deficient number, since it is larger than the sum of its proper divisors (1).

50331221 is an equidigital number, since it uses as much as digits as its factorization.

50331221 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 180, while the sum is 17.

The square root of 50331221 is about 7094.4500139193. The cubic root of 50331221 is about 369.2148458867.

Adding to 50331221 its reverse (12213305), we get a palindrome (62544526).

The spelling of 50331221 in words is "fifty million, three hundred thirty-one thousand, two hundred twenty-one".