218325593 has 2 divisors, whose sum is σ = 218325594. Its totient is φ = 218325592.

The previous prime is 218325587. The next prime is 218325631. The reversal of 218325593 is 395523812.

It is an a-pointer prime, because the next prime (218325631) can be obtained adding 218325593 to its sum of digits (38).

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 213949129 + 4376464 = 14627^2 + 2092^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-218325593 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (218322593) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 109162796 + 109162797.

It is an arithmetic number, because the mean of its divisors is an integer number (109162797).

Almost surely, 2^218325593 is an apocalyptic number.

It is an amenable number.

218325593 is a deficient number, since it is larger than the sum of its proper divisors (1).

218325593 is an equidigital number, since it uses as much as digits as its factorization.

218325593 is an evil number, because the sum of its binary digits is even.

The product of its digits is 64800, while the sum is 38.

The square root of 218325593 is about 14775.8449166198. The cubic root of 218325593 is about 602.1456447200.

The spelling of 218325593 in words is "two hundred eighteen million, three hundred twenty-five thousand, five hundred ninety-three".