2220815557 has 2 divisors, whose sum is σ = 2220815558. Its totient is φ = 2220815556.

The previous prime is 2220815543. The next prime is 2220815579. The reversal of 2220815557 is 7555180222.

2220815557 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 2047472001 + 173343556 = 45249^2 + 13166^2 .

It is a cyclic number.

It is not a de Polignac number, because 2220815557 - 2¹¹ = 2220813509 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2220815507) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1110407778 + 1110407779.

It is an arithmetic number, because the mean of its divisors is an integer number (1110407779).

Almost surely, 2^2220815557 is an apocalyptic number.

It is an amenable number.

2220815557 is a deficient number, since it is larger than the sum of its proper divisors (1).

2220815557 is an equidigital number, since it uses as much as digits as its factorization.

2220815557 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 56000, while the sum is 37.

The square root of 2220815557 is about 47125.5297795155. The cubic root of 2220815557 is about 1304.6804768633.

Adding to 2220815557 its reverse (7555180222), we get a palindrome (9775995779).

The spelling of 2220815557 in words is "two billion, two hundred twenty million, eight hundred fifteen thousand, five hundred fifty-seven".