216020862697 has 2 divisors, whose sum is σ = 216020862698. Its totient is φ = 216020862696.

The previous prime is 216020862679. The next prime is 216020862703. The reversal of 216020862697 is 796268020612.

Together with previous prime (216020862679) it forms an Ormiston pair, because they use the same digits, order apart.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 207567715216 + 8453147481 = 455596^2 + 91941^2 .

It is a cyclic number.

It is not a de Polignac number, because 216020862697 - 2¹⁹ = 216020338409 is a prime.

It is a super-2 number, since 2×216020862697² (a number of 23 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 216020862697.

It is not a weakly prime, because it can be changed into another prime (216020862667) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 108010431348 + 108010431349.

It is an arithmetic number, because the mean of its divisors is an integer number (108010431349).

Almost surely, 2^216020862697 is an apocalyptic number.

It is an amenable number.

216020862697 is a deficient number, since it is larger than the sum of its proper divisors (1).

216020862697 is an equidigital number, since it uses as much as digits as its factorization.

216020862697 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 870912, while the sum is 49.

The spelling of 216020862697 in words is "two hundred sixteen billion, twenty million, eight hundred sixty-two thousand, six hundred ninety-seven".