216332648251 has 2 divisors, whose sum is σ = 216332648252. Its totient is φ = 216332648250.

The previous prime is 216332648237. The next prime is 216332648269. The reversal of 216332648251 is 152846233612.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 216332648251 - 2¹³ = 216332640059 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 216332648198 and 216332648207.

It is not a weakly prime, because it can be changed into another prime (216332648201) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 108166324125 + 108166324126.

It is an arithmetic number, because the mean of its divisors is an integer number (108166324126).

Almost surely, 2^216332648251 is an apocalyptic number.

216332648251 is a deficient number, since it is larger than the sum of its proper divisors (1).

216332648251 is an equidigital number, since it uses as much as digits as its factorization.

216332648251 is an evil number, because the sum of its binary digits is even.

The product of its digits is 414720, while the sum is 43.

The spelling of 216332648251 in words is "two hundred sixteen billion, three hundred thirty-two million, six hundred forty-eight thousand, two hundred fifty-one".