217066984941 has 16 divisors (see below), whose sum is σ = 306488340864. Its totient is φ = 136180744704.

The previous prime is 217066984933. The next prime is 217066984973. The reversal of 217066984941 is 149489660712.

It is not a de Polignac number, because 217066984941 - 2³ = 217066984933 is a prime.

It is a super-3 number, since 3×217066984941³ (a number of 35 digits) contains 333 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (217066964941) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 108201 + ... + 667713.

It is an arithmetic number, because the mean of its divisors is an integer number (19155521304).

Almost surely, 2^217066984941 is an apocalyptic number.

It is an amenable number.

217066984941 is a deficient number, since it is larger than the sum of its proper divisors (89421355923).

217066984941 is a wasteful number, since it uses less digits than its factorization.

217066984941 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 567140.

The product of its (nonzero) digits is 5225472, while the sum is 57.

The spelling of 217066984941 in words is "two hundred seventeen billion, sixty-six million, nine hundred eighty-four thousand, nine hundred forty-one".