217043248499 has 12 divisors (see below), whose sum is σ = 275431507128. Its totient is φ = 169124608800.

The previous prime is 217043248489. The next prime is 217043248507. The reversal of 217043248499 is 994842340712.

It is a de Polignac number, because none of the positive numbers 2^k-217043248499 is a prime.

It is a Smith number, since the sum of its digits (53) coincides with the sum of the digits of its prime factors.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 217043248499.

It is not an unprimeable number, because it can be changed into a prime (217043248439) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 201338282 + ... + 201339359.

It is an arithmetic number, because the mean of its divisors is an integer number (22952625594).

Almost surely, 2^217043248499 is an apocalyptic number.

217043248499 is a deficient number, since it is larger than the sum of its proper divisors (58388258629).

217043248499 is a wasteful number, since it uses less digits than its factorization.

217043248499 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 402677666 (or 402677659 counting only the distinct ones).

The product of its (nonzero) digits is 3483648, while the sum is 53.

The spelling of 217043248499 in words is "two hundred seventeen billion, forty-three million, two hundred forty-eight thousand, four hundred ninety-nine".