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13200181 = 16779043
BaseRepresentation
bin110010010110…
…101100110101
3220211122020121
4302112230311
511334401211
61150531541
7220125331
oct62265465
926748217
1013200181
1174a6545
124506bb1
132972377
141a787c1
15125b271
hexc96b35

13200181 has 4 divisors (see below), whose sum is σ = 13279392. Its totient is φ = 13120972.

The previous prime is 13200179. The next prime is 13200199. The reversal of 13200181 is 18100231.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 13200181 - 21 = 13200179 is a prime.

It is a super-2 number, since 2×132001812 = 348489556865522, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13200101) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 39355 + ... + 39688.

It is an arithmetic number, because the mean of its divisors is an integer number (3319848).

Almost surely, 213200181 is an apocalyptic number.

It is an amenable number.

13200181 is a deficient number, since it is larger than the sum of its proper divisors (79211).

13200181 is an equidigital number, since it uses as much as digits as its factorization.

13200181 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 79210.

The product of its (nonzero) digits is 48, while the sum is 16.

The square root of 13200181 is about 3633.2053341368. The cubic root of 13200181 is about 236.3342302982.

The spelling of 13200181 in words is "thirteen million, two hundred thousand, one hundred eighty-one".

Divisors: 1 167 79043 13200181