220242204257 has 2 divisors, whose sum is σ = 220242204258. Its totient is φ = 220242204256.

The previous prime is 220242204163. The next prime is 220242204271. The reversal of 220242204257 is 752402242022.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 161504319376 + 58737884881 = 401876^2 + 242359^2 .

It is a cyclic number.

It is not a de Polignac number, because 220242204257 - 2¹² = 220242200161 is a prime.

It is not a weakly prime, because it can be changed into another prime (220242204757) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 110121102128 + 110121102129.

It is an arithmetic number, because the mean of its divisors is an integer number (110121102129).

Almost surely, 2^220242204257 is an apocalyptic number.

It is an amenable number.

220242204257 is a deficient number, since it is larger than the sum of its proper divisors (1).

220242204257 is an equidigital number, since it uses as much as digits as its factorization.

220242204257 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 35840, while the sum is 32.

Adding to 220242204257 its reverse (752402242022), we get a palindrome (972644446279).

The spelling of 220242204257 in words is "two hundred twenty billion, two hundred forty-two million, two hundred four thousand, two hundred fifty-seven".