Base | Representation |
---|---|
bin | 111011001110… |
… | …0011001101001 |
3 | 2011102110122212 |
4 | 1312130121221 |
5 | 30422034241 |
6 | 3025254505 |
7 | 524625542 |
oct | 166343151 |
9 | 64373585 |
10 | 31049321 |
11 | 165878a6 |
12 | a494435 |
13 | 65817a4 |
14 | 41a34c9 |
15 | 2ad4beb |
hex | 1d9c669 |
31049321 has 8 divisors (see below), whose sum is σ = 32116224. Its totient is φ = 29986560.
The previous prime is 31049299. The next prime is 31049323. The reversal of 31049321 is 12394013.
It is a sphenic number, since it is the product of 3 distinct primes.
It is a cyclic number.
It is not a de Polignac number, because 31049321 - 26 = 31049257 is a prime.
It is a super-2 number, since 2×310493212 = 1928120669122082, which contains 22 as substring.
It is a Duffinian number.
It is not an unprimeable number, because it can be changed into a prime (31049323) 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, 24905 + ... + 26121.
It is an arithmetic number, because the mean of its divisors is an integer number (4014528).
Almost surely, 231049321 is an apocalyptic number.
31049321 is a gapful number since it is divisible by the number (31) formed by its first and last digit.
It is an amenable number.
31049321 is a deficient number, since it is larger than the sum of its proper divisors (1066903).
31049321 is a wasteful number, since it uses less digits than its factorization.
31049321 is an evil number, because the sum of its binary digits is even.
The sum of its prime factors is 2071.
The product of its (nonzero) digits is 648, while the sum is 23.
The square root of 31049321 is about 5572.1917590837. The cubic root of 31049321 is about 314.3045748520.
The spelling of 31049321 in words is "thirty-one million, forty-nine thousand, three hundred twenty-one".
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