217272633993 has 24 divisors (see below), whose sum is σ = 314749642688. Its totient is φ = 144428290272.

The previous prime is 217272633937. The next prime is 217272634013. The reversal of 217272633993 is 399336272712.

217272633993 is a `hidden beast` number, since 217 + 2 + 7 + 2 + 6 + 339 + 93 = 666.

It is not a de Polignac number, because 217272633993 - 2¹² = 217272629897 is a prime.

It is a super-3 number, since 3×217272633993³ (a number of 35 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is a hoax number, since the sum of its digits (54) coincides with the sum of the digits of its distinct prime factors.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (217272633293) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 5296146 + ... + 5337012.

Almost surely, 2^217272633993 is an apocalyptic number.

It is an amenable number.

217272633993 is a deficient number, since it is larger than the sum of its proper divisors (97477008695).

217272633993 is a wasteful number, since it uses less digits than its factorization.

217272633993 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 42573 (or 42570 counting only the distinct ones).

The product of its digits is 5143824, while the sum is 54.

The spelling of 217272633993 in words is "two hundred seventeen billion, two hundred seventy-two million, six hundred thirty-three thousand, nine hundred ninety-three".