217182967457 has 2 divisors, whose sum is σ = 217182967458. Its totient is φ = 217182967456.

The previous prime is 217182967411. The next prime is 217182967459. The reversal of 217182967457 is 754769281712.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 180012669841 + 37170297616 = 424279^2 + 192796^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-217182967457 is a prime.

Together with 217182967459, it forms a pair of twin primes.

It is a Chen prime.

It is a junction number, because it is equal to n+sod(n) for n = 217182967396 and 217182967405.

It is not a weakly prime, because it can be changed into another prime (217182967459) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 108591483728 + 108591483729.

It is an arithmetic number, because the mean of its divisors is an integer number (108591483729).

Almost surely, 2^217182967457 is an apocalyptic number.

It is an amenable number.

217182967457 is a deficient number, since it is larger than the sum of its proper divisors (1).

217182967457 is an equidigital number, since it uses as much as digits as its factorization.

217182967457 is an evil number, because the sum of its binary digits is even.

The product of its digits is 11854080, while the sum is 59.

The spelling of 217182967457 in words is "two hundred seventeen billion, one hundred eighty-two million, nine hundred sixty-seven thousand, four hundred fifty-seven".