216118351 has 2 divisors, whose sum is σ = 216118352. Its totient is φ = 216118350.

The previous prime is 216118321. The next prime is 216118367. The reversal of 216118351 is 153811612.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 216118351 - 2¹³ = 216110159 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (216118321) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 108059175 + 108059176.

It is an arithmetic number, because the mean of its divisors is an integer number (108059176).

Almost surely, 2^216118351 is an apocalyptic number.

216118351 is a deficient number, since it is larger than the sum of its proper divisors (1).

216118351 is an equidigital number, since it uses as much as digits as its factorization.

216118351 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1440, while the sum is 28.

The square root of 216118351 is about 14700.9642881003. The cubic root of 216118351 is about 600.1095642508.

Adding to 216118351 its reverse (153811612), we get a palindrome (369929963).

The spelling of 216118351 in words is "two hundred sixteen million, one hundred eighteen thousand, three hundred fifty-one".