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13202171 = 89148339
BaseRepresentation
bin110010010111…
…001011111011
3220211201222022
4302113023323
511334432141
61150545055
7220134203
oct62271373
926751868
1013202171
1174a7a94
12450818b
132973248
141a79403
15125bb4b
hexc972fb

13202171 has 4 divisors (see below), whose sum is σ = 13350600. Its totient is φ = 13053744.

The previous prime is 13202143. The next prime is 13202173. The reversal of 13202171 is 17120231.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 17120231 = 149311467.

It is a cyclic number.

It is not a de Polignac number, because 13202171 - 26 = 13202107 is a prime.

It is a super-2 number, since 2×132021712 = 348594638226482, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (13202173) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 74081 + ... + 74258.

It is an arithmetic number, because the mean of its divisors is an integer number (3337650).

Almost surely, 213202171 is an apocalyptic number.

13202171 is a deficient number, since it is larger than the sum of its proper divisors (148429).

13202171 is an equidigital number, since it uses as much as digits as its factorization.

13202171 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 148428.

The product of its (nonzero) digits is 84, while the sum is 17.

The square root of 13202171 is about 3633.4791866749. The cubic root of 13202171 is about 236.3461059304.

The spelling of 13202171 in words is "thirteen million, two hundred two thousand, one hundred seventy-one".

Divisors: 1 89 148339 13202171