Base | Representation |
---|---|
bin | 11111101100101… |
… | …011000011011101 |
3 | 1101001200110110120 |
4 | 133230223003131 |
5 | 2042120220011 |
6 | 124434225153 |
7 | 16115156043 |
oct | 3754530335 |
9 | 1331613416 |
10 | 531804381 |
11 | 25320a559 |
12 | 12a1251b9 |
13 | 8623c464 |
14 | 508b4393 |
15 | 31a4ba06 |
hex | 1fb2b0dd |
531804381 has 8 divisors (see below), whose sum is σ = 709269120. Its totient is φ = 354437952.
The previous prime is 531804341. The next prime is 531804391. The reversal of 531804381 is 183408135.
It is a sphenic number, since it is the product of 3 distinct primes.
It is not a de Polignac number, because 531804381 - 29 = 531803869 is a prime.
It is a super-2 number, since 2×5318043812 = 565631799301586322, which contains 22 as substring.
It is a congruent number.
It is not an unprimeable number, because it can be changed into a prime (531804341) by changing a digit.
It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 10860 + ... + 34373.
It is an arithmetic number, because the mean of its divisors is an integer number (88658640).
Almost surely, 2531804381 is an apocalyptic number.
It is an amenable number.
531804381 is a deficient number, since it is larger than the sum of its proper divisors (177464739).
531804381 is a wasteful number, since it uses less digits than its factorization.
531804381 is an evil number, because the sum of its binary digits is even.
The sum of its prime factors is 49155.
The product of its (nonzero) digits is 11520, while the sum is 33.
The square root of 531804381 is about 23060.8842198212. The cubic root of 531804381 is about 810.1845746121.
The spelling of 531804381 in words is "five hundred thirty-one million, eight hundred four thousand, three hundred eighty-one".
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