Base | Representation |
---|---|
bin | 11111001110111… |
… | …110110111100100 |
3 | 1100112001000222100 |
4 | 133032332313210 |
5 | 2033122134340 |
6 | 123555332100 |
7 | 15662051442 |
oct | 3716766744 |
9 | 1315030870 |
10 | 524021220 |
11 | 249883998 |
12 | 1275b1030 |
13 | 84745938 |
14 | 4d849b92 |
15 | 31010830 |
hex | 1f3bede4 |
524021220 has 144 divisors (see below), whose sum is σ = 1649007360. Its totient is φ = 134604288.
The previous prime is 524021207. The next prime is 524021227. The reversal of 524021220 is 22120425.
It is a Harshad number since it is a multiple of its sum of digits (18).
It is a junction number, because it is equal to n+sod(n) for n = 524021193 and 524021202.
It is not an unprimeable number, because it can be changed into a prime (524021227) by changing a digit.
It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 611032 + ... + 611888.
It is an arithmetic number, because the mean of its divisors is an integer number (11451440).
Almost surely, 2524021220 is an apocalyptic number.
It is an amenable number.
It is a practical number, because each smaller number is the sum of distinct divisors of 524021220, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (824503680).
524021220 is an abundant number, since it is smaller than the sum of its proper divisors (1124986140).
It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.
524021220 is a wasteful number, since it uses less digits than its factorization.
524021220 is an evil number, because the sum of its binary digits is even.
The sum of its prime factors is 994 (or 989 counting only the distinct ones).
The product of its (nonzero) digits is 320, while the sum is 18.
The square root of 524021220 is about 22891.5097798289. The cubic root of 524021220 is about 806.2126804431.
Adding to 524021220 its reverse (22120425), we get a palindrome (546141645).
The spelling of 524021220 in words is "five hundred twenty-four million, twenty-one thousand, two hundred twenty".
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