Base | Representation |
---|---|
bin | 11010011110110… |
… | …10110111100101 |
3 | 120111000012001102 |
4 | 31033122313211 |
5 | 423332133041 |
6 | 34013205445 |
7 | 5335132016 |
oct | 1517326745 |
9 | 514005042 |
10 | 222146021 |
11 | 104439659 |
12 | 62490885 |
13 | 3703c466 |
14 | 2170900d |
15 | 1478109b |
hex | d3dade5 |
222146021 has 4 divisors (see below), whose sum is σ = 235213452. Its totient is φ = 209078592.
The previous prime is 222145993. The next prime is 222146027. The reversal of 222146021 is 120641222.
It is a happy number.
It is a semiprime because it is the product of two primes.
It can be written as a sum of positive squares in 2 ways, for example, as 190053796 + 32092225 = 13786^2 + 5665^2 .
It is a cyclic number.
It is a de Polignac number, because none of the positive numbers 2k-222146021 is a prime.
It is a super-2 number, since 2×2221460212 = 98697709292264882, which contains 22 as substring.
It is a Duffinian number.
It is a junction number, because it is equal to n+sod(n) for n = 222145984 and 222146002.
It is a congruent number.
It is not an unprimeable number, because it can be changed into a prime (222146027) 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, 6533690 + ... + 6533723.
It is an arithmetic number, because the mean of its divisors is an integer number (58803363).
Almost surely, 2222146021 is an apocalyptic number.
It is an amenable number.
222146021 is a deficient number, since it is larger than the sum of its proper divisors (13067431).
222146021 is a wasteful number, since it uses less digits than its factorization.
222146021 is an evil number, because the sum of its binary digits is even.
The sum of its prime factors is 13067430.
The product of its (nonzero) digits is 384, while the sum is 20.
The square root of 222146021 is about 14904.5637641630. The cubic root of 222146021 is about 605.6376229573.
Adding to 222146021 its reverse (120641222), we get a palindrome (342787243).
The spelling of 222146021 in words is "two hundred twenty-two million, one hundred forty-six thousand, twenty-one".
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