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13130231120 = 245164127889
BaseRepresentation
bin11000011101001111…
…10110110101010000
31020220001211211222022
430032213312311100
5203342314343440
610010522231012
7643244060126
oct141647666520
936801754868
1013130231120
115628744a86
122665355468
13131336b736
148c7b89916
1551cac8cb5
hex30e9f6d50

13130231120 has 20 divisors (see below), whose sum is σ = 30527787540. Its totient is φ = 5252092416.

The previous prime is 13130231117. The next prime is 13130231131. The reversal of 13130231120 is 2113203131.

It can be written as a sum of positive squares in 2 ways, for example, as 7067428624 + 6062802496 = 84068^2 + 77864^2 .

It is a tau number, because it is divible by the number of its divisors (20).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 82063865 + ... + 82064024.

It is an arithmetic number, because the mean of its divisors is an integer number (1526389377).

Almost surely, 213130231120 is an apocalyptic number.

13130231120 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

13130231120 is an abundant number, since it is smaller than the sum of its proper divisors (17397556420).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

13130231120 is a wasteful number, since it uses less digits than its factorization.

13130231120 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 164127902 (or 164127896 counting only the distinct ones).

The product of its (nonzero) digits is 108, while the sum is 17.

Adding to 13130231120 its reverse (2113203131), we get a palindrome (15243434251).

The spelling of 13130231120 in words is "thirteen billion, one hundred thirty million, two hundred thirty-one thousand, one hundred twenty".

Divisors: 1 2 4 5 8 10 16 20 40 80 164127889 328255778 656511556 820639445 1313023112 1641278890 2626046224 3282557780 6565115560 13130231120