Base | Representation |
---|---|
bin | 11000001100010000011… |
… | …00010010000000110100 |
3 | 2221110111201001100221200 |
4 | 30012020030102000310 |
5 | 102104311140442022 |
6 | 1433504304212500 |
7 | 114024151046403 |
oct | 14061014220064 |
9 | 2843451040850 |
10 | 831213609012 |
11 | 2a057445a186 |
12 | 11511790a130 |
13 | 604c98bc3c7 |
14 | 2c333a4363a |
15 | 1694d743bac |
hex | c188312034 |
831213609012 has 72 divisors (see below), whose sum is σ = 2161467549696. Its totient is φ = 269138407104.
The previous prime is 831213609011. The next prime is 831213609041. The reversal of 831213609012 is 210906312138.
831213609012 is a `hidden beast` number, since 8 + 31 + 2 + 1 + 3 + 609 + 0 + 12 = 666.
It is a super-2 number, since 2×8312136090122 (a number of 25 digits) contains 22 as substring.
It is a Harshad number since it is a multiple of its sum of digits (36).
It is a congruent number.
It is not an unprimeable number, because it can be changed into a prime (831213609011) by changing a digit.
It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 294493 + ... + 1322555.
Almost surely, 2831213609012 is an apocalyptic number.
It is an amenable number.
It is a practical number, because each smaller number is the sum of distinct divisors of 831213609012, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1080733774848).
831213609012 is an abundant number, since it is smaller than the sum of its proper divisors (1330253940684).
It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.
831213609012 is a wasteful number, since it uses less digits than its factorization.
831213609012 is an evil number, because the sum of its binary digits is even.
The sum of its prime factors is 1028717 (or 1028712 counting only the distinct ones).
The product of its (nonzero) digits is 15552, while the sum is 36.
The spelling of 831213609012 in words is "eight hundred thirty-one billion, two hundred thirteen million, six hundred nine thousand, twelve".
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