Base | Representation |
---|---|
bin | 111111100000100… |
… | …0111111100010111 |
3 | 12111111212001222002 |
4 | 1333001013330113 |
5 | 13331014013421 |
6 | 551242425515 |
7 | 103544132141 |
oct | 17701077427 |
9 | 5444761862 |
10 | 2131001111 |
11 | 9a3992748 |
12 | 4b580229b |
13 | 27c653705 |
14 | 163039c91 |
15 | c713cb0b |
hex | 7f047f17 |
2131001111 has 4 divisors (see below), whose sum is σ = 2131338000. Its totient is φ = 2130664224.
The previous prime is 2131001099. The next prime is 2131001141. The reversal of 2131001111 is 1111001312.
It is a happy number.
It is a semiprime because it is the product of two primes.
It is a cyclic number.
It is a de Polignac number, because none of the positive numbers 2k-2131001111 is a prime.
It is a Duffinian number.
It is a junction number, because it is equal to n+sod(n) for n = 2131001092 and 2131001101.
It is a congruent number.
It is not an unprimeable number, because it can be changed into a prime (2131001141) 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 in 3 ways as a sum of consecutive naturals, for example, 158771 + ... + 171668.
It is an arithmetic number, because the mean of its divisors is an integer number (532834500).
Almost surely, 22131001111 is an apocalyptic number.
2131001111 is a deficient number, since it is larger than the sum of its proper divisors (336889).
2131001111 is an equidigital number, since it uses as much as digits as its factorization.
2131001111 is an odious number, because the sum of its binary digits is odd.
The sum of its prime factors is 336888.
The product of its (nonzero) digits is 6, while the sum is 11.
The square root of 2131001111 is about 46162.7675838440. The cubic root of 2131001111 is about 1286.8498967745.
Adding to 2131001111 its reverse (1111001312), we get a palindrome (3242002423).
The spelling of 2131001111 in words is "two billion, one hundred thirty-one million, one thousand, one hundred eleven".
• e-mail: info -at- numbersaplenty.com • Privacy notice • done in 0.062 sec. • engine limits •