217007744253 has 8 divisors (see below), whose sum is σ = 297163758048. Its totient is φ = 140761779984.

The previous prime is 217007744243. The next prime is 217007744257. The reversal of 217007744253 is 352447700712.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 217007744253 - 2¹³ = 217007736061 is a prime.

It is a super-2 number, since 2×217007744253² (a number of 23 digits) contains 22 as substring.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (217007744257) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 977512251 + ... + 977512472.

It is an arithmetic number, because the mean of its divisors is an integer number (37145469756).

Almost surely, 2^217007744253 is an apocalyptic number.

It is an amenable number.

217007744253 is a deficient number, since it is larger than the sum of its proper divisors (80156013795).

217007744253 is a wasteful number, since it uses less digits than its factorization.

217007744253 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1955024763.

The product of its (nonzero) digits is 329280, while the sum is 42.

The spelling of 217007744253 in words is "two hundred seventeen billion, seven million, seven hundred forty-four thousand, two hundred fifty-three".