217384400053 has 2 divisors, whose sum is σ = 217384400054. Its totient is φ = 217384400052.

The previous prime is 217384400011. The next prime is 217384400059. The reversal of 217384400053 is 350004483712.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 161223931729 + 56160468324 = 401527^2 + 236982^2 .

It is a cyclic number.

It is not a de Polignac number, because 217384400053 - 2²⁹ = 216847529141 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 217384399985 and 217384400021.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (217384400059) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 108692200026 + 108692200027.

It is an arithmetic number, because the mean of its divisors is an integer number (108692200027).

Almost surely, 2^217384400053 is an apocalyptic number.

It is an amenable number.

217384400053 is a deficient number, since it is larger than the sum of its proper divisors (1).

217384400053 is an equidigital number, since it uses as much as digits as its factorization.

217384400053 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 80640, while the sum is 37.

Adding to 217384400053 its reverse (350004483712), we get a palindrome (567388883765).

The spelling of 217384400053 in words is "two hundred seventeen billion, three hundred eighty-four million, four hundred thousand, fifty-three".