Base | Representation |
---|---|
bin | 11101001010011010… |
… | …011000010000000011 |
3 | 2222211021022101022000 |
4 | 131022122120100003 |
5 | 1003112134401011 |
6 | 22215102315043 |
7 | 2155653544443 |
oct | 351232302003 |
9 | 88737271260 |
10 | 31313200131 |
11 | 123095377a4 |
12 | 609a888a83 |
13 | 2c504723b5 |
14 | 1730a04123 |
15 | c34075356 |
hex | 74a698403 |
31313200131 has 32 divisors (see below), whose sum is σ = 47221247040. Its totient is φ = 20503756800.
The previous prime is 31313200129. The next prime is 31313200153. The reversal of 31313200131 is 13100231313.
It is a happy number.
31313200131 is a `hidden beast` number, since 313 + 1 + 320 + 0 + 1 + 31 = 666.
It is not a de Polignac number, because 31313200131 - 21 = 31313200129 is a prime.
It is a super-2 number, since 2×313132001312 (a number of 22 digits) contains 22 as substring.
It is not an unprimeable number, because it can be changed into a prime (31313200111) by changing a digit.
It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 442051 + ... + 507971.
It is an arithmetic number, because the mean of its divisors is an integer number (1475663970).
Almost surely, 231313200131 is an apocalyptic number.
31313200131 is a deficient number, since it is larger than the sum of its proper divisors (15908046909).
31313200131 is a wasteful number, since it uses less digits than its factorization.
31313200131 is an evil number, because the sum of its binary digits is even.
The sum of its prime factors is 66244 (or 66238 counting only the distinct ones).
The product of its (nonzero) digits is 162, while the sum is 18.
Adding to 31313200131 its reverse (13100231313), we get a palindrome (44413431444).
The spelling of 31313200131 in words is "thirty-one billion, three hundred thirteen million, two hundred thousand, one hundred thirty-one".
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