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13200231031 = 13432549163
BaseRepresentation
bin11000100101100101…
…11000101001110111
31021001221120012210121
430102302320221313
5204013224343111
610021502432411
7645054053401
oct142262705167
937057505717
1013200231031
115664205a49
122684892707
131324a0a1c0
148d31abb71
15523d04871
hex312cb8a77

13200231031 has 12 divisors (see below), whose sum is σ = 14553944328. Its totient is φ = 11901438864.

The previous prime is 13200230983. The next prime is 13200231041. The reversal of 13200231031 is 13013200231.

It is not a de Polignac number, because 13200231031 - 27 = 13200230903 is a prime.

It is a super-2 number, since 2×132002310312 (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 = 13200230996 and 13200231014.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13200231041) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 250545 + ... + 298618.

It is an arithmetic number, because the mean of its divisors is an integer number (1212828694).

Almost surely, 213200231031 is an apocalyptic number.

13200231031 is a deficient number, since it is larger than the sum of its proper divisors (1353713297).

13200231031 is an equidigital number, since it uses as much as digits as its factorization.

13200231031 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 549262 (or 549219 counting only the distinct ones).

The product of its (nonzero) digits is 108, while the sum is 16.

Adding to 13200231031 its reverse (13013200231), we get a palindrome (26213431262).

The spelling of 13200231031 in words is "thirteen billion, two hundred million, two hundred thirty-one thousand, thirty-one".

Divisors: 1 13 43 559 1849 24037 549163 7139119 23614009 306982117 1015402387 13200231031