220312241 has 2 divisors, whose sum is σ = 220312242. Its totient is φ = 220312240.

The previous prime is 220312237. The next prime is 220312243. The reversal of 220312241 is 142213022.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 110670400 + 109641841 = 10520^2 + 10471^2 .

It is a cyclic number.

It is not a de Polignac number, because 220312241 - 2² = 220312237 is a prime.

Together with 220312243, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (220312243) 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, 110156120 + 110156121.

It is an arithmetic number, because the mean of its divisors is an integer number (110156121).

Almost surely, 2^220312241 is an apocalyptic number.

It is an amenable number.

220312241 is a deficient number, since it is larger than the sum of its proper divisors (1).

220312241 is an equidigital number, since it uses as much as digits as its factorization.

220312241 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 192, while the sum is 17.

The square root of 220312241 is about 14842.9188841009. The cubic root of 220312241 is about 603.9665356151.

Adding to 220312241 its reverse (142213022), we get a palindrome (362525263).

The spelling of 220312241 in words is "two hundred twenty million, three hundred twelve thousand, two hundred forty-one".