Search a number
-
+
13031130012 = 2231957154079
BaseRepresentation
bin11000010001011011…
…10100001110011100
31020122011100222210220
430020231310032130
5203141432130022
65553022201340
7640631530455
oct141055641634
936564328726
1013031130012
11558780793a
122638123250
1312c8981124
148b895012c
1551405085c
hex308b7439c

13031130012 has 24 divisors (see below), whose sum is σ = 32006284800. Its totient is φ = 4115093616.

The previous prime is 13031129983. The next prime is 13031130017. The reversal of 13031130012 is 21003113031.

It is a junction number, because it is equal to n+sod(n) for n = 13031129973 and 13031130000.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13031130017) 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, 28576812 + ... + 28577267.

It is an arithmetic number, because the mean of its divisors is an integer number (1333595200).

Almost surely, 213031130012 is an apocalyptic number.

13031130012 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

13031130012 is an abundant number, since it is smaller than the sum of its proper divisors (18975154788).

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

13031130012 is a wasteful number, since it uses less digits than its factorization.

13031130012 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 57154105 (or 57154103 counting only the distinct ones).

The product of its (nonzero) digits is 54, while the sum is 15.

Adding to 13031130012 its reverse (21003113031), we get a palindrome (34034243043).

The spelling of 13031130012 in words is "thirteen billion, thirty-one million, one hundred thirty thousand, twelve".

Divisors: 1 2 3 4 6 12 19 38 57 76 114 228 57154079 114308158 171462237 228616316 342924474 685848948 1085927501 2171855002 3257782503 4343710004 6515565006 13031130012