Base | Representation |
---|---|
bin | 1100110111110111010… |
… | …1001001001001100001 |
3 | 210010211122001022200201 |
4 | 3031331311021021201 |
5 | 12110411012241301 |
6 | 245332534345201 |
7 | 21656261340616 |
oct | 3157565111141 |
9 | 703748038621 |
10 | 221154415201 |
11 | 858779a1475 |
12 | 36a401bb201 |
13 | 17b15c1a715 |
14 | a9bd82c50d |
15 | 5b45724201 |
hex | 337dd49261 |
221154415201 has 8 divisors (see below), whose sum is σ = 226240669160. Its totient is φ = 216123748992.
The previous prime is 221154415187. The next prime is 221154415217. The reversal of 221154415201 is 102514451122.
It can be written as a sum of positive squares in 4 ways, for example, as 82975683025 + 138178732176 = 288055^2 + 371724^2 .
It is a sphenic number, since it is the product of 3 distinct primes.
It is a de Polignac number, because none of the positive numbers 2k-221154415201 is a prime.
It is a Duffinian number.
It is a self number, because there is not a number n which added to its sum of digits gives 221154415201.
It is not an unprimeable number, because it can be changed into a prime (221154415271) by changing a digit.
It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 13888890 + ... + 13904803.
It is an arithmetic number, because the mean of its divisors is an integer number (28280083645).
Almost surely, 2221154415201 is an apocalyptic number.
It is an amenable number.
221154415201 is a deficient number, since it is larger than the sum of its proper divisors (5086253959).
221154415201 is a wasteful number, since it uses less digits than its factorization.
221154415201 is an evil number, because the sum of its binary digits is even.
The sum of its prime factors is 27793875.
The product of its (nonzero) digits is 3200, while the sum is 28.
Adding to 221154415201 its reverse (102514451122), we get a palindrome (323668866323).
The spelling of 221154415201 in words is "two hundred twenty-one billion, one hundred fifty-four million, four hundred fifteen thousand, two hundred one".
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