Base | Representation |
---|---|
bin | 11101001111000111… |
… | …010010000101001111 |
3 | 10000000202201220102022 |
4 | 131033013102011033 |
5 | 1003242333031312 |
6 | 22231001120355 |
7 | 2160632164505 |
oct | 351707220517 |
9 | 100022656368 |
10 | 31392080207 |
11 | 1234a013544 |
12 | 61011890bb |
13 | 2c638ccab7 |
14 | 173b298675 |
15 | c3ae57172 |
hex | 74f1d214f |
31392080207 has 2 divisors, whose sum is σ = 31392080208. Its totient is φ = 31392080206.
The previous prime is 31392080197. The next prime is 31392080249. The reversal of 31392080207 is 70208029313.
It is a weak prime.
It is an emirp because it is prime and its reverse (70208029313) is a distict prime.
It is a cyclic number.
It is not a de Polignac number, because 31392080207 - 26 = 31392080143 is a prime.
It is a congruent number.
It is not a weakly prime, because it can be changed into another prime (31392080257) by changing a digit.
It is a pernicious number, because its binary representation contains a prime number (19) of ones.
It is a polite number, since it can be written as a sum of consecutive naturals, namely, 15696040103 + 15696040104.
It is an arithmetic number, because the mean of its divisors is an integer number (15696040104).
Almost surely, 231392080207 is an apocalyptic number.
31392080207 is a deficient number, since it is larger than the sum of its proper divisors (1).
31392080207 is an equidigital number, since it uses as much as digits as its factorization.
31392080207 is an odious number, because the sum of its binary digits is odd.
The product of its (nonzero) digits is 18144, while the sum is 35.
The spelling of 31392080207 in words is "thirty-one billion, three hundred ninety-two million, eighty thousand, two hundred seven".
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