220242577 has 2 divisors, whose sum is σ = 220242578. Its totient is φ = 220242576.

The previous prime is 220242557. The next prime is 220242593. The reversal of 220242577 is 775242022.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 220195921 + 46656 = 14839^2 + 216^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-220242577 is a prime.

It is not a weakly prime, because it can be changed into another prime (220242527) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 110121288 + 110121289.

It is an arithmetic number, because the mean of its divisors is an integer number (110121289).

Almost surely, 2^220242577 is an apocalyptic number.

It is an amenable number.

220242577 is a deficient number, since it is larger than the sum of its proper divisors (1).

220242577 is an equidigital number, since it uses as much as digits as its factorization.

220242577 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 15680, while the sum is 31.

The square root of 220242577 is about 14840.5719903244. The cubic root of 220242577 is about 603.9028696713.

Adding to 220242577 its reverse (775242022), we get a palindrome (995484599).

The spelling of 220242577 in words is "two hundred twenty million, two hundred forty-two thousand, five hundred seventy-seven".