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13200211231 = 82116078211
BaseRepresentation
bin11000100101100101…
…10011110100011111
31021001221112012122021
430102302303310133
5204013223224411
610021502201011
7645053641564
oct142262636437
937057465567
1013200211231
1156641a2089
122684883167
131324a0119c
148d31a486b
15523ceda71
hex312cb3d1f

13200211231 has 4 divisors (see below), whose sum is σ = 13216290264. Its totient is φ = 13184132200.

The previous prime is 13200211223. The next prime is 13200211237. The reversal of 13200211231 is 13211200231.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 13211200231 = 67197182093.

It is a cyclic number.

It is not a de Polignac number, because 13200211231 - 23 = 13200211223 is a prime.

It is a super-2 number, since 2×132002112312 (a number of 21 digits) 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 (13200211237) 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 3 ways as a sum of consecutive naturals, for example, 8038285 + ... + 8039926.

It is an arithmetic number, because the mean of its divisors is an integer number (3304072566).

Almost surely, 213200211231 is an apocalyptic number.

13200211231 is a deficient number, since it is larger than the sum of its proper divisors (16079033).

13200211231 is an equidigital number, since it uses as much as digits as its factorization.

13200211231 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16079032.

The product of its (nonzero) digits is 72, while the sum is 16.

Adding to 13200211231 its reverse (13211200231), we get a palindrome (26411411462).

The spelling of 13200211231 in words is "thirteen billion, two hundred million, two hundred eleven thousand, two hundred thirty-one".

Divisors: 1 821 16078211 13200211231