220324961 has 2 divisors, whose sum is σ = 220324962. Its totient is φ = 220324960.

The previous prime is 220324943. The next prime is 220324987. The reversal of 220324961 is 169423022.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 117180625 + 103144336 = 10825^2 + 10156^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-220324961 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (220324261) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 110162480 + 110162481.

It is an arithmetic number, because the mean of its divisors is an integer number (110162481).

Almost surely, 2^220324961 is an apocalyptic number.

It is an amenable number.

220324961 is a deficient number, since it is larger than the sum of its proper divisors (1).

220324961 is an equidigital number, since it uses as much as digits as its factorization.

220324961 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 5184, while the sum is 29.

The square root of 220324961 is about 14843.3473650656. The cubic root of 220324961 is about 603.9781589766.

Adding to 220324961 its reverse (169423022), we get a palindrome (389747983).

The spelling of 220324961 in words is "two hundred twenty million, three hundred twenty-four thousand, nine hundred sixty-one".