Base | Representation |
---|---|
bin | 101000111000… |
… | …0110001010001 |
3 | 1111022221010120 |
4 | 1101300301101 |
5 | 20441332200 |
6 | 2043220453 |
7 | 350116056 |
oct | 121606121 |
9 | 44287116 |
10 | 21433425 |
11 | 1110a282 |
12 | 7217729 |
13 | 4595a00 |
14 | 2bbd02d |
15 | 1d359a0 |
hex | 1470c51 |
21433425 has 72 divisors (see below), whose sum is σ = 40845600. Its totient is φ = 9884160.
The previous prime is 21433421. The next prime is 21433427. The reversal of 21433425 is 52433412.
21433425 is nontrivially palindromic in base 8.
It is not a de Polignac number, because 21433425 - 22 = 21433421 is a prime.
It is a junction number, because it is equal to n+sod(n) for n = 21433395 and 21433404.
It is a congruent number.
It is not an unprimeable number, because it can be changed into a prime (21433421) by changing a digit.
It is a polite number, since it can be written in 71 ways as a sum of consecutive naturals, for example, 240781 + ... + 240869.
It is an arithmetic number, because the mean of its divisors is an integer number (567300).
Almost surely, 221433425 is an apocalyptic number.
21433425 is a gapful number since it is divisible by the number (25) formed by its first and last digit.
It is an amenable number.
21433425 is a deficient number, since it is larger than the sum of its proper divisors (19412175).
21433425 is a wasteful number, since it uses less digits than its factorization.
21433425 is an evil number, because the sum of its binary digits is even.
The sum of its prime factors is 147 (or 129 counting only the distinct ones).
The product of its digits is 2880, while the sum is 24.
The square root of 21433425 is about 4629.6247148122. The cubic root of 21433425 is about 277.7775811850. Note that the first 3 decimals are identical.
Adding to 21433425 its reverse (52433412), we get a palindrome (73866837).
The spelling of 21433425 in words is "twenty-one million, four hundred thirty-three thousand, four hundred twenty-five".
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