218305151 has 2 divisors, whose sum is σ = 218305152. Its totient is φ = 218305150.

The previous prime is 218305123. The next prime is 218305159. The reversal of 218305151 is 151503812.

It is a happy number.

218305151 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-218305151 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 218305151.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (218305159) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 109152575 + 109152576.

It is an arithmetic number, because the mean of its divisors is an integer number (109152576).

Almost surely, 2^218305151 is an apocalyptic number.

218305151 is a deficient number, since it is larger than the sum of its proper divisors (1).

218305151 is an equidigital number, since it uses as much as digits as its factorization.

218305151 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1200, while the sum is 26.

The square root of 218305151 is about 14775.1531633347. The cubic root of 218305151 is about 602.1268510072.

Adding to 218305151 its reverse (151503812), we get a palindrome (369808963).

The spelling of 218305151 in words is "two hundred eighteen million, three hundred five thousand, one hundred fifty-one".