217005512052 has 24 divisors (see below), whose sum is σ = 578681365696. Its totient is φ = 62001574848.

The previous prime is 217005512051. The next prime is 217005512081. The reversal of 217005512052 is 250215500712.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (217005512051) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1291699393 + ... + 1291699560.

Almost surely, 2^217005512052 is an apocalyptic number.

It is an amenable number.

217005512052 is an abundant number, since it is smaller than the sum of its proper divisors (361675853644).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

217005512052 is a wasteful number, since it uses less digits than its factorization.

217005512052 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2583398967 (or 2583398965 counting only the distinct ones).

The product of its (nonzero) digits is 7000, while the sum is 30.

The spelling of 217005512052 in words is "two hundred seventeen billion, five million, five hundred twelve thousand, fifty-two".