221600222057 has 4 divisors (see below), whose sum is σ = 221818979460. Its totient is φ = 221381464656.

The previous prime is 221600222033. The next prime is 221600222069. The reversal of 221600222057 is 750222006122.

221600222057 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 62290675561 + 159309546496 = 249581^2 + 399136^2 .

It is a cyclic number.

It is not a de Polignac number, because 221600222057 - 2¹⁰ = 221600221033 is a prime.

It is a super-2 number, since 2×221600222057² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (221605222057) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 109377182 + ... + 109379207.

It is an arithmetic number, because the mean of its divisors is an integer number (55454744865).

Almost surely, 2^221600222057 is an apocalyptic number.

It is an amenable number.

221600222057 is a deficient number, since it is larger than the sum of its proper divisors (218757403).

221600222057 is a wasteful number, since it uses less digits than its factorization.

221600222057 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 218757402.

The product of its (nonzero) digits is 6720, while the sum is 29.

Adding to 221600222057 its reverse (750222006122), we get a palindrome (971822228179).

The spelling of 221600222057 in words is "two hundred twenty-one billion, six hundred million, two hundred twenty-two thousand, fifty-seven".