216613322433251 has 2 divisors, whose sum is σ = 216613322433252. Its totient is φ = 216613322433250.

The previous prime is 216613322433223. The next prime is 216613322433253. The reversal of 216613322433251 is 152334223316612.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 216613322433251 - 2⁶ = 216613322433187 is a prime.

Together with 216613322433253, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (216613322433253) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 108306661216625 + 108306661216626.

It is an arithmetic number, because the mean of its divisors is an integer number (108306661216626).

Almost surely, 2^{216613322433251} is an apocalyptic number.

216613322433251 is a deficient number, since it is larger than the sum of its proper divisors (1).

216613322433251 is an equidigital number, since it uses as much as digits as its factorization.

216613322433251 is an evil number, because the sum of its binary digits is even.

The product of its digits is 933120, while the sum is 44.

Adding to 216613322433251 its reverse (152334223316612), we get a palindrome (368947545749863).

The spelling of 216613322433251 in words is "two hundred sixteen trillion, six hundred thirteen billion, three hundred twenty-two million, four hundred thirty-three thousand, two hundred fifty-one".