Base | Representation |
---|---|
bin | 111111100000111… |
… | …1101101110111111 |
3 | 12111112021021012101 |
4 | 1333001331232333 |
5 | 13331043041224 |
6 | 551251245531 |
7 | 103546040404 |
oct | 17701755677 |
9 | 5445237171 |
10 | 2131221439 |
11 | 9a4023236 |
12 | 4b58a98a7 |
13 | 27c6cca99 |
14 | 1630962ab |
15 | c7183044 |
hex | 7f07dbbf |
2131221439 has 8 divisors (see below), whose sum is σ = 2304600768. Its totient is φ = 1963176960.
The previous prime is 2131221437. The next prime is 2131221509. The reversal of 2131221439 is 9341221312.
It is a happy number.
It is a sphenic number, since it is the product of 3 distinct primes.
It is a cyclic number.
It is not a de Polignac number, because 2131221439 - 21 = 2131221437 is a prime.
It is a Duffinian number.
It is a congruent number.
It is not an unprimeable number, because it can be changed into a prime (2131221437) by changing a digit.
It is a pernicious number, because its binary representation contains a prime number (23) of ones.
It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1332882 + ... + 1334479.
It is an arithmetic number, because the mean of its divisors is an integer number (288075096).
Almost surely, 22131221439 is an apocalyptic number.
2131221439 is a deficient number, since it is larger than the sum of its proper divisors (173379329).
2131221439 is a wasteful number, since it uses less digits than its factorization.
2131221439 is an odious number, because the sum of its binary digits is odd.
The sum of its prime factors is 2667425.
The product of its digits is 2592, while the sum is 28.
The square root of 2131221439 is about 46165.1539475393. The cubic root of 2131221439 is about 1286.8942451469.
The spelling of 2131221439 in words is "two billion, one hundred thirty-one million, two hundred twenty-one thousand, four hundred thirty-nine".
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