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13243203031 = 171136893911
BaseRepresentation
bin11000101010101101…
…10011110111010111
31021011221102102022011
430111112303313113
5204110224444111
610030035445051
7646115240242
oct142526636727
937157372264
1013243203031
1156864964a3
122697156787
1313308a4716
148d8b96259
15527992021
hex3155b3dd7

13243203031 has 8 divisors (see below), whose sum is σ = 14146307424. Its totient is φ = 12353886720.

The previous prime is 13243203011. The next prime is 13243203047. The reversal of 13243203031 is 13030234231.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 13243203031 - 223 = 13234814423 is a prime.

It is a super-2 number, since 2×132432030312 (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 13243202993 and 13243203011.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13243203011) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3445035 + ... + 3448876.

It is an arithmetic number, because the mean of its divisors is an integer number (1768288428).

Almost surely, 213243203031 is an apocalyptic number.

13243203031 is a deficient number, since it is larger than the sum of its proper divisors (903104393).

13243203031 is a wasteful number, since it uses less digits than its factorization.

13243203031 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6894041.

The product of its (nonzero) digits is 1296, while the sum is 22.

Adding to 13243203031 its reverse (13030234231), we get a palindrome (26273437262).

The spelling of 13243203031 in words is "thirteen billion, two hundred forty-three million, two hundred three thousand, thirty-one".

Divisors: 1 17 113 1921 6893911 117196487 779011943 13243203031