220323220261 has 2 divisors, whose sum is σ = 220323220262. Its totient is φ = 220323220260.

The previous prime is 220323220253. The next prime is 220323220279. The reversal of 220323220261 is 162022323022.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 204208187236 + 16115033025 = 451894^2 + 126945^2 .

It is a cyclic number.

It is not a de Polignac number, because 220323220261 - 2³ = 220323220253 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (220323250261) 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, 110161610130 + 110161610131.

It is an arithmetic number, because the mean of its divisors is an integer number (110161610131).

Almost surely, 2^220323220261 is an apocalyptic number.

It is an amenable number.

220323220261 is a deficient number, since it is larger than the sum of its proper divisors (1).

220323220261 is an equidigital number, since it uses as much as digits as its factorization.

220323220261 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 3456, while the sum is 25.

Adding to 220323220261 its reverse (162022323022), we get a palindrome (382345543283).

The spelling of 220323220261 in words is "two hundred twenty billion, three hundred twenty-three million, two hundred twenty thousand, two hundred sixty-one".