| Base | Representation |
|---|---|
| bin | 111110101000011… |
| … | …0001111110100100 |
| 3 | 12102110102212000200 |
| 4 | 1331100301332210 |
| 5 | 13300444113022 |
| 6 | 544311310500 |
| 7 | 103035613611 |
| oct | 17520617644 |
| 9 | 5373385020 |
| 10 | 2101551012 |
| 11 | 9892a8420 |
| 12 | 4a797b430 |
| 13 | 276511b12 |
| 14 | 15d171508 |
| 15 | c4771bac |
| hex | 7d431fa4 |
2101551012 has 144 divisors (see below), whose sum is σ = 6265896000. Its totient is φ = 586932480.
The previous prime is 2101551007. The next prime is 2101551017.
2101551012 is a `hidden beast` number, since 2 + 101 + 551 + 0 + 12 = 666.
2101551012 is nontrivially palindromic in base 10.
It is an interprime number because it is at equal distance from previous prime (2101551007) and next prime (2101551017).
It is a Harshad number since it is a multiple of its sum of digits (18).
It is not an unprimeable number, because it can be changed into a prime (2101551017) by changing a digit.
It is a pernicious number, because its binary representation contains a prime number (17) of ones.
It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 274614 + ... + 282162.
Almost surely, 22101551012 is an apocalyptic number.
2101551012 is a gapful number since it is divisible by the number (22) formed by its first and last digit.
It is an amenable number.
It is a practical number, because each smaller number is the sum of distinct divisors of 2101551012, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (3132948000).
2101551012 is an abundant number, since it is smaller than the sum of its proper divisors (4164344988).
It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.
2101551012 is a wasteful number, since it uses less digits than its factorization.
2101551012 is an odious number, because the sum of its binary digits is odd.
The sum of its prime factors is 7626 (or 7621 counting only the distinct ones).
The product of its (nonzero) digits is 100, while the sum is 18.
The square root of 2101551012 is about 45842.6767543083. The cubic root of 2101551012 is about 1280.8943562362.
It can be divided in two parts, 21015 and 51012, that added together give a palindrome (72027).
The spelling of 2101551012 in words is "two billion, one hundred one million, five hundred fifty-one thousand, twelve".
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