Base | Representation |
---|---|
bin | 11101000011110111… |
… | …001100010111011001 |
3 | 2222112121112112122110 |
4 | 131003313030113121 |
5 | 1002401022004423 |
6 | 22200135142533 |
7 | 2153150533230 |
oct | 350367142731 |
9 | 88477475573 |
10 | 31203313113 |
11 | 12262502a85 |
12 | 6069b14a49 |
13 | 2c337795ab |
14 | 172019bb17 |
15 | c295bb193 |
hex | 743dcc5d9 |
31203313113 has 64 divisors (see below), whose sum is σ = 49545216000. Its totient is φ = 17100293184.
The previous prime is 31203313081. The next prime is 31203313117. The reversal of 31203313113 is 31131330213.
It is not a de Polignac number, because 31203313113 - 25 = 31203313081 is a prime.
It is a Harshad number since it is a multiple of its sum of digits (21).
It is a self number, because there is not a number n which added to its sum of digits gives 31203313113.
It is not an unprimeable number, because it can be changed into a prime (31203313117) by changing a digit.
It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 10836808 + ... + 10839686.
It is an arithmetic number, because the mean of its divisors is an integer number (774144000).
Almost surely, 231203313113 is an apocalyptic number.
It is an amenable number.
31203313113 is a deficient number, since it is larger than the sum of its proper divisors (18341902887).
31203313113 is a wasteful number, since it uses less digits than its factorization.
31203313113 is an evil number, because the sum of its binary digits is even.
The sum of its prime factors is 3154.
The product of its (nonzero) digits is 486, while the sum is 21.
Adding to 31203313113 its reverse (31131330213), we get a palindrome (62334643326).
The spelling of 31203313113 in words is "thirty-one billion, two hundred three million, three hundred thirteen thousand, one hundred thirteen".
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