Base | Representation |
---|---|
bin | 11010011010001… |
… | …00110011001110 |
3 | 120102211221212112 |
4 | 31031010303032 |
5 | 423203000332 |
6 | 33552104022 |
7 | 5326661654 |
oct | 1515046316 |
9 | 512757775 |
10 | 221531342 |
11 | 10405985a |
12 | 62235012 |
13 | 36b85746 |
14 | 215c8dd4 |
15 | 146addb2 |
hex | d344cce |
221531342 has 4 divisors (see below), whose sum is σ = 332297016. Its totient is φ = 110765670.
The previous prime is 221531341. The next prime is 221531347. The reversal of 221531342 is 243135122.
221531342 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.
It is a semiprime because it is the product of two primes.
It is a super-2 number, since 2×2215313422 = 98152270976641928, which contains 22 as substring.
It is a congruent number.
It is not an unprimeable number, because it can be changed into a prime (221531341) by changing a digit.
It is a polite number, since it can be written as a sum of consecutive naturals, namely, 55382834 + ... + 55382837.
It is an arithmetic number, because the mean of its divisors is an integer number (83074254).
Almost surely, 2221531342 is an apocalyptic number.
221531342 is a deficient number, since it is larger than the sum of its proper divisors (110765674).
221531342 is a wasteful number, since it uses less digits than its factorization.
221531342 is an evil number, because the sum of its binary digits is even.
The sum of its prime factors is 110765673.
The product of its digits is 1440, while the sum is 23.
The square root of 221531342 is about 14883.9289839746. The cubic root of 221531342 is about 605.0785063072.
Adding to 221531342 its reverse (243135122), we get a palindrome (464666464).
The spelling of 221531342 in words is "two hundred twenty-one million, five hundred thirty-one thousand, three hundred forty-two".
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