Base | Representation |
---|---|
bin | 1101101101110… |
… | …1101110111001 |
3 | 11000020220010200 |
4 | 3123131232321 |
5 | 104212000241 |
6 | 5413032413 |
7 | 1266002541 |
oct | 333355671 |
9 | 130226120 |
10 | 57531321 |
11 | 2a525151 |
12 | 17325709 |
13 | bbc4403 |
14 | 78d8321 |
15 | 50b64b6 |
hex | 36ddbb9 |
57531321 has 12 divisors (see below), whose sum is σ = 83166720. Its totient is φ = 38323800.
The previous prime is 57531311. The next prime is 57531329. The reversal of 57531321 is 12313575.
It is not a de Polignac number, because 57531321 - 27 = 57531193 is a prime.
It is not an unprimeable number, because it can be changed into a prime (57531329) by changing a digit.
It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 19800 + ... + 22518.
It is an arithmetic number, because the mean of its divisors is an integer number (6930560).
Almost surely, 257531321 is an apocalyptic number.
It is an amenable number.
57531321 is a deficient number, since it is larger than the sum of its proper divisors (25635399).
57531321 is a wasteful number, since it uses less digits than its factorization.
57531321 is an evil number, because the sum of its binary digits is even.
The sum of its prime factors is 5076 (or 5073 counting only the distinct ones).
The product of its digits is 3150, while the sum is 27.
The square root of 57531321 is about 7584.9404084673. The cubic root of 57531321 is about 386.0422000987.
Adding to 57531321 its reverse (12313575), we get a palindrome (69844896).
The spelling of 57531321 in words is "fifty-seven million, five hundred thirty-one thousand, three hundred twenty-one".
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