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9997050217 = 73115349993
BaseRepresentation
bin10010100111101111…
…01110000101101001
3221210201012202210011
421103313232011221
5130433221101332
64331555251521
7502510345000
oct112367560551
927721182704
109997050217
11427008a880
121b2bba9ba1
13c341c693b
146ab9d5c37
153d79c8e47
hex253dee169

9997050217 has 32 divisors (see below), whose sum is σ = 12958444800. Its totient is φ = 7642776960.

The previous prime is 9997050197. The next prime is 9997050229. The reversal of 9997050217 is 7120507999.

It is not a de Polignac number, because 9997050217 - 215 = 9997017449 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (49).

It is not an unprimeable number, because it can be changed into a prime (9997054217) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 174973 + ... + 224965.

It is an arithmetic number, because the mean of its divisors is an integer number (404951400).

Almost surely, 29997050217 is an apocalyptic number.

9997050217 is the 49993-rd decagonal number.

It is an amenable number.

9997050217 is a deficient number, since it is larger than the sum of its proper divisors (2961394583).

9997050217 is a wasteful number, since it uses less digits than its factorization.

9997050217 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 50078 (or 50064 counting only the distinct ones).

The product of its (nonzero) digits is 357210, while the sum is 49.

The square root of 9997050217 is about 99985.2499971871. The cubic root of 9997050217 is about 2154.2228320386. Note that the first 3 decimals are identical.

The spelling of 9997050217 in words is "nine billion, nine hundred ninety-seven million, fifty thousand, two hundred seventeen".

Divisors: 1 7 11 49 53 77 343 371 539 583 2597 3773 4081 18179 28567 49993 199969 349951 549923 2449657 2649629 3849461 17147599 18547403 26946227 29145919 129831821 188623589 204021433 908822747 1428150031 9997050217