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13104430031 = 711991171733
BaseRepresentation
bin11000011010001010…
…11011101111001111
31020211021022000112102
430031011123233033
5203314213230111
610004201225315
7642511550240
oct141505335717
936737260472
1013104430031
115615122270
12265879223b
13130ac06a14
148c4590cc7
1551a6ce13b
hex30d15bbcf

13104430031 has 16 divisors (see below), whose sum is σ = 16354572288. Its totient is φ = 10200880800.

The previous prime is 13104430007. The next prime is 13104430051. The reversal of 13104430031 is 13003440131.

It is not a de Polignac number, because 13104430031 - 26 = 13104429967 is a prime.

It is a super-2 number, since 2×131044300312 (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 = 13104429985 and 13104430012.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13104430051) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 9560 + ... + 162173.

It is an arithmetic number, because the mean of its divisors is an integer number (1022160768).

Almost surely, 213104430031 is an apocalyptic number.

13104430031 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

13104430031 is a deficient number, since it is larger than the sum of its proper divisors (3250142257).

13104430031 is a wasteful number, since it uses less digits than its factorization.

13104430031 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 172742.

The product of its (nonzero) digits is 432, while the sum is 20.

Adding to 13104430031 its reverse (13003440131), we get a palindrome (26107870162).

The spelling of 13104430031 in words is "thirteen billion, one hundred four million, four hundred thirty thousand, thirty-one".

Divisors: 1 7 11 77 991 6937 10901 76307 171733 1202131 1889063 13223441 170187403 1191311821 1872061433 13104430031