217097250011 has 4 divisors (see below), whose sum is σ = 218397233712. Its totient is φ = 215797266312.

The previous prime is 217097249983. The next prime is 217097250031. The reversal of 217097250011 is 110052790712.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-217097250011 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (217097250031) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 649991600 + ... + 649991933.

It is an arithmetic number, because the mean of its divisors is an integer number (54599308428).

Almost surely, 2^217097250011 is an apocalyptic number.

217097250011 is a deficient number, since it is larger than the sum of its proper divisors (1299983701).

217097250011 is a wasteful number, since it uses less digits than its factorization.

217097250011 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1299983700.

The product of its (nonzero) digits is 8820, while the sum is 35.

The spelling of 217097250011 in words is "two hundred seventeen billion, ninety-seven million, two hundred fifty thousand, eleven".