216125164237 has 2 divisors, whose sum is σ = 216125164238. Its totient is φ = 216125164236.

The previous prime is 216125164169. The next prime is 216125164289. The reversal of 216125164237 is 732461521612.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 142990615881 + 73134548356 = 378141^2 + 270434^2 .

It is a cyclic number.

It is not a de Polignac number, because 216125164237 - 2¹¹ = 216125162189 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 216125164237.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (216125164637) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 108062582118 + 108062582119.

It is an arithmetic number, because the mean of its divisors is an integer number (108062582119).

Almost surely, 2^216125164237 is an apocalyptic number.

It is an amenable number.

216125164237 is a deficient number, since it is larger than the sum of its proper divisors (1).

216125164237 is an equidigital number, since it uses as much as digits as its factorization.

216125164237 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 120960, while the sum is 40.

Adding to 216125164237 its reverse (732461521612), we get a palindrome (948586685849).

The spelling of 216125164237 in words is "two hundred sixteen billion, one hundred twenty-five million, one hundred sixty-four thousand, two hundred thirty-seven".