240233221 has 2 divisors, whose sum is σ = 240233222. Its totient is φ = 240233220.

The previous prime is 240233219. The next prime is 240233237. The reversal of 240233221 is 122332042.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 149793121 + 90440100 = 12239^2 + 9510^2 .

It is a cyclic number.

It is not a de Polignac number, because 240233221 - 2¹ = 240233219 is a prime.

Together with 240233219, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (240933221) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 120116610 + 120116611.

It is an arithmetic number, because the mean of its divisors is an integer number (120116611).

Almost surely, 2^240233221 is an apocalyptic number.

It is an amenable number.

240233221 is a deficient number, since it is larger than the sum of its proper divisors (1).

240233221 is an equidigital number, since it uses as much as digits as its factorization.

240233221 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 576, while the sum is 19.

The square root of 240233221 is about 15499.4587324848. The cubic root of 240233221 is about 621.6477337643.

Adding to 240233221 its reverse (122332042), we get a palindrome (362565263).

The spelling of 240233221 in words is "two hundred forty million, two hundred thirty-three thousand, two hundred twenty-one".