216204127057 has 2 divisors, whose sum is σ = 216204127058. Its totient is φ = 216204127056.

The previous prime is 216204126977. The next prime is 216204127063. The reversal of 216204127057 is 750721402612.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 176165717841 + 40038409216 = 419721^2 + 200096^2 .

It is a cyclic number.

It is not a de Polignac number, because 216204127057 - 2¹¹ = 216204125009 is a prime.

It is not a weakly prime, because it can be changed into another prime (216204127357) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 108102063528 + 108102063529.

It is an arithmetic number, because the mean of its divisors is an integer number (108102063529).

Almost surely, 2^216204127057 is an apocalyptic number.

It is an amenable number.

216204127057 is a deficient number, since it is larger than the sum of its proper divisors (1).

216204127057 is an equidigital number, since it uses as much as digits as its factorization.

216204127057 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 47040, while the sum is 37.

Adding to 216204127057 its reverse (750721402612), we get a palindrome (966925529669).

The spelling of 216204127057 in words is "two hundred sixteen billion, two hundred four million, one hundred twenty-seven thousand, fifty-seven".