Base | Representation |
---|---|
bin | 1000111101111… |
… | …00110100110001 |
3 | 12020112200121220 |
4 | 10132330310301 |
5 | 123224103241 |
6 | 11244135253 |
7 | 1602244026 |
oct | 436746461 |
9 | 166480556 |
10 | 75222321 |
11 | 39508709 |
12 | 21237529 |
13 | 12779865 |
14 | 9dc154d |
15 | 690d166 |
hex | 47bcd31 |
75222321 has 4 divisors (see below), whose sum is σ = 100296432. Its totient is φ = 50148212.
The previous prime is 75222281. The next prime is 75222373. The reversal of 75222321 is 12322257.
It is a happy number.
It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 12322257 = 3 ⋅4107419.
It is a cyclic number.
It is not a de Polignac number, because 75222321 - 211 = 75220273 is a prime.
It is a junction number, because it is equal to n+sod(n) for n = 75222291 and 75222300.
It is not an unprimeable number, because it can be changed into a prime (75222421) by changing a digit.
It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 12537051 + ... + 12537056.
It is an arithmetic number, because the mean of its divisors is an integer number (25074108).
Almost surely, 275222321 is an apocalyptic number.
It is an amenable number.
75222321 is a deficient number, since it is larger than the sum of its proper divisors (25074111).
75222321 is a wasteful number, since it uses less digits than its factorization.
75222321 is an odious number, because the sum of its binary digits is odd.
The sum of its prime factors is 25074110.
The product of its digits is 1680, while the sum is 24.
The square root of 75222321 is about 8673.0802486775. The cubic root of 75222321 is about 422.1326166908.
Adding to 75222321 its reverse (12322257), we get a palindrome (87544578).
The spelling of 75222321 in words is "seventy-five million, two hundred twenty-two thousand, three hundred twenty-one".
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