216696594723251 has 2 divisors, whose sum is σ = 216696594723252. Its totient is φ = 216696594723250.

The previous prime is 216696594723247. The next prime is 216696594723269. The reversal of 216696594723251 is 152327495696612.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 216696594723251 - 2² = 216696594723247 is a prime.

It is not a weakly prime, because it can be changed into another prime (216696594723211) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 108348297361625 + 108348297361626.

It is an arithmetic number, because the mean of its divisors is an integer number (108348297361626).

Almost surely, 2^{216696594723251} is an apocalyptic number.

216696594723251 is a deficient number, since it is larger than the sum of its proper divisors (1).

216696594723251 is an equidigital number, since it uses as much as digits as its factorization.

216696594723251 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 293932800, while the sum is 68.

The spelling of 216696594723251 in words is "two hundred sixteen trillion, six hundred ninety-six billion, five hundred ninety-four million, seven hundred twenty-three thousand, two hundred fifty-one".