217837509083 has 6 divisors (see below), whose sum is σ = 229906069524. Its totient is φ = 206372376684.

The previous prime is 217837509061. The next prime is 217837509229. The reversal of 217837509083 is 380905738712.

It is not a de Polignac number, because 217837509083 - 2²⁸ = 217569073627 is a prime.

It is a super-2 number, since 2×217837509083² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (217837509053) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 301713641 + ... + 301714362.

It is an arithmetic number, because the mean of its divisors is an integer number (38317678254).

Almost surely, 2^217837509083 is an apocalyptic number.

217837509083 is a deficient number, since it is larger than the sum of its proper divisors (12068560441).

217837509083 is an equidigital number, since it uses as much as digits as its factorization.

217837509083 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 603428041 (or 603428022 counting only the distinct ones).

The product of its (nonzero) digits is 2540160, while the sum is 53.

The spelling of 217837509083 in words is "two hundred seventeen billion, eight hundred thirty-seven million, five hundred nine thousand, eighty-three".