Base | Representation |
---|---|
bin | 10010011111011… |
… | …11011100101010 |
3 | 101210212222121220 |
4 | 21033233130222 |
5 | 304202341300 |
6 | 23220442510 |
7 | 3562340061 |
oct | 1117573452 |
9 | 353788556 |
10 | 155121450 |
11 | 7a620050 |
12 | 43b49436 |
13 | 261a3053 |
14 | 1685d1d8 |
15 | d941da0 |
hex | 93ef72a |
155121450 has 96 divisors (see below), whose sum is σ = 430097472. Its totient is φ = 36672000.
The previous prime is 155121433. The next prime is 155121451. The reversal of 155121450 is 54121551.
It is a self number, because there is not a number n which added to its sum of digits gives 155121450.
It is not an unprimeable number, because it can be changed into a prime (155121451) 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, 66504 + ... + 68796.
It is an arithmetic number, because the mean of its divisors is an integer number (4480182).
Almost surely, 2155121450 is an apocalyptic number.
155121450 is a gapful number since it is divisible by the number (10) formed by its first and last digit.
It is a practical number, because each smaller number is the sum of distinct divisors of 155121450, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (215048736).
155121450 is an abundant number, since it is smaller than the sum of its proper divisors (274976022).
It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.
155121450 is a wasteful number, since it uses less digits than its factorization.
155121450 is an odious number, because the sum of its binary digits is odd.
The sum of its prime factors is 2360 (or 2355 counting only the distinct ones).
The product of its (nonzero) digits is 1000, while the sum is 24.
The square root of 155121450 is about 12454.7761922886. The cubic root of 155121450 is about 537.3087980466.
The spelling of 155121450 in words is "one hundred fifty-five million, one hundred twenty-one thousand, four hundred fifty".
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