Base | Representation |
---|---|
bin | 1000001110001010000100 |
3 | 11001111022000 |
4 | 20032022010 |
5 | 1022431030 |
6 | 114105300 |
7 | 24214131 |
oct | 10161204 |
9 | 4044260 |
10 | 2155140 |
11 | 1242209 |
12 | 87b230 |
13 | 5a5c40 |
14 | 401588 |
15 | 2c8860 |
hex | 20e284 |
2155140 has 96 divisors (see below), whose sum is σ = 7244160. Its totient is φ = 528768.
The previous prime is 2155133. The next prime is 2155159. The reversal of 2155140 is 415512.
It is a Harshad number since it is a multiple of its sum of digits (18).
It is a congruent number.
It is an unprimeable number.
It is a pernicious number, because its binary representation contains a prime number (7) of ones.
It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 6867 + ... + 7173.
It is an arithmetic number, because the mean of its divisors is an integer number (75460).
22155140 is an apocalyptic number.
2155140 is a gapful number since it is divisible by the number (20) 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 2155140, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (3622080).
2155140 is an abundant number, since it is smaller than the sum of its proper divisors (5089020).
It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.
2155140 is a wasteful number, since it uses less digits than its factorization.
2155140 is an odious number, because the sum of its binary digits is odd.
The sum of its prime factors is 338 (or 330 counting only the distinct ones).
The product of its (nonzero) digits is 200, while the sum is 18.
The square root of 2155140 is about 1468.0395090051. The cubic root of 2155140 is about 129.1690590377.
The spelling of 2155140 in words is "two million, one hundred fifty-five thousand, one hundred forty".
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