Base | Representation |
---|---|
bin | 11101001010111001… |
… | …010100111110111100 |
3 | 2222211211120120100111 |
4 | 131022321110332330 |
5 | 1003121224010322 |
6 | 22215552235404 |
7 | 2156112524650 |
oct | 351271247674 |
9 | 88754516314 |
10 | 31321313212 |
11 | 12313079222 |
12 | 60a153bb64 |
13 | 2c52053137 |
14 | 1731b16a60 |
15 | c34b29177 |
hex | 74ae54fbc |
31321313212 has 24 divisors (see below), whose sum is σ = 63262856160. Its totient is φ = 13290513600.
The previous prime is 31321313209. The next prime is 31321313237. The reversal of 31321313212 is 21231312313.
It is a super-2 number, since 2×313213132122 (a number of 22 digits) contains 22 as substring.
It is a congruent number.
It is an unprimeable number.
It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 5534887 + ... + 5540542.
It is an arithmetic number, because the mean of its divisors is an integer number (2635952340).
Almost surely, 231321313212 is an apocalyptic number.
It is an amenable number.
31321313212 is an abundant number, since it is smaller than the sum of its proper divisors (31941542948).
It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.
31321313212 is a wasteful number, since it uses less digits than its factorization.
31321313212 is an odious number, because the sum of its binary digits is odd.
The sum of its prime factors is 11075541 (or 11075539 counting only the distinct ones).
The product of its digits is 648, while the sum is 22.
Adding to 31321313212 its reverse (21231312313), we get a palindrome (52552625525).
The spelling of 31321313212 in words is "thirty-one billion, three hundred twenty-one million, three hundred thirteen thousand, two hundred twelve".
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