219231330077 has 2 divisors, whose sum is σ = 219231330078. Its totient is φ = 219231330076.

The previous prime is 219231330053. The next prime is 219231330151. The reversal of 219231330077 is 770033132912.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 218929474201 + 301855876 = 467899^2 + 17374^2 .

It is a cyclic number.

It is not a de Polignac number, because 219231330077 - 2¹⁶ = 219231264541 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 219231330077.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (219231330277) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 109615665038 + 109615665039.

It is an arithmetic number, because the mean of its divisors is an integer number (109615665039).

Almost surely, 2^219231330077 is an apocalyptic number.

It is an amenable number.

219231330077 is a deficient number, since it is larger than the sum of its proper divisors (1).

219231330077 is an equidigital number, since it uses as much as digits as its factorization.

219231330077 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 47628, while the sum is 38.

Adding to 219231330077 its reverse (770033132912), we get a palindrome (989264462989).

The spelling of 219231330077 in words is "two hundred nineteen billion, two hundred thirty-one million, three hundred thirty thousand, seventy-seven".