| Base | Representation |
|---|---|
| bin | 110010011011… |
| … | …111001001010 |
| 3 | 220212201102100 |
| 4 | 302123321022 |
| 5 | 11341041300 |
| 6 | 1151214230 |
| 7 | 220244334 |
| oct | 62337112 |
| 9 | 26781370 |
| 10 | 13221450 |
| 11 | 7510520 |
| 12 | 4517376 |
| 13 | 297bc58 |
| 14 | 1a82454 |
| 15 | 1262700 |
| hex | c9be4a |
13221450 has 72 divisors (see below), whose sum is σ = 38765376. Its totient is φ = 3204000.
The previous prime is 13221443. The next prime is 13221457. The reversal of 13221450 is 5412231.
It is an interprime number because it is at equal distance from previous prime (13221443) and next prime (13221457).
It is a Harshad number since it is a multiple of its sum of digits (18).
It is not an unprimeable number, because it can be changed into a prime (13221457) by changing a digit.
It is a pernicious number, because its binary representation contains a prime number (13) of ones.
It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 3615 + ... + 6285.
It is an arithmetic number, because the mean of its divisors is an integer number (538408).
Almost surely, 213221450 is an apocalyptic number.
13221450 is a gapful number since it is divisible by the number (10) formed by its first and last digit.
It is a practical number, because each smaller number is the sum of distinct divisors of 13221450, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (19382688).
13221450 is an abundant number, since it is smaller than the sum of its proper divisors (25543926).
It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.
13221450 is a wasteful number, since it uses less digits than its factorization.
13221450 is an odious number, because the sum of its binary digits is odd.
The sum of its prime factors is 2700 (or 2692 counting only the distinct ones).
The product of its (nonzero) digits is 240, while the sum is 18.
The square root of 13221450 is about 3636.1311857522. The cubic root of 13221450 is about 236.4610946049.
Adding to 13221450 its reverse (5412231), we get a palindrome (18633681).
It can be divided in two parts, 1322 and 1450, that added together give a palindrome (2772).
The spelling of 13221450 in words is "thirteen million, two hundred twenty-one thousand, four hundred fifty".
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