| Base | Representation |
|---|---|
| bin | 100100100000110… |
| … | …0000010011010110 |
| 3 | 10011101022010002110 |
| 4 | 1021001200103112 |
| 5 | 10002113144342 |
| 6 | 321322451450 |
| 7 | 42234305100 |
| oct | 11101402326 |
| 9 | 3141263073 |
| 10 | 1225131222 |
| 11 | 579611247 |
| 12 | 2a2363b86 |
| 13 | 166a83323 |
| 14 | b89d2570 |
| 15 | 72851c9c |
| hex | 490604d6 |
1225131222 has 96 divisors (see below), whose sum is σ = 2960133120. Its totient is φ = 336692160.
The previous prime is 1225131221. The next prime is 1225131223. The reversal of 1225131222 is 2221315221.
It is an interprime number because it is at equal distance from previous prime (1225131221) and next prime (1225131223).
It is a super-2 number, since 2×12251312222 = 3001893022238426568, which contains 22 as substring.
It is a Harshad number since it is a multiple of its sum of digits (21).
It is a congruent number.
It is not an unprimeable number, because it can be changed into a prime (1225131221) by changing a digit.
It is a pernicious number, because its binary representation contains a prime number (11) of ones.
It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 2086813 + ... + 2087399.
It is an arithmetic number, because the mean of its divisors is an integer number (30834720).
Almost surely, 21225131222 is an apocalyptic number.
It is a practical number, because each smaller number is the sum of distinct divisors of 1225131222, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1480066560).
1225131222 is an abundant number, since it is smaller than the sum of its proper divisors (1735001898).
It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.
1225131222 is a wasteful number, since it uses less digits than its factorization.
1225131222 is an odious number, because the sum of its binary digits is odd.
The sum of its prime factors is 866 (or 859 counting only the distinct ones).
The product of its digits is 480, while the sum is 21.
The square root of 1225131222 is about 35001.8745498009. The cubic root of 1225131222 is about 1070.0256848873.
Adding to 1225131222 its reverse (2221315221), we get a palindrome (3446446443).
The spelling of 1225131222 in words is "one billion, two hundred twenty-five million, one hundred thirty-one thousand, two hundred twenty-two".
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