Base | Representation |
---|---|
bin | 1111110111100011011… |
… | …01110101000001100101 |
3 | 1221010022101212210102122 |
4 | 13323301231311001211 |
5 | 32413103111431041 |
6 | 1054245434315325 |
7 | 54251042515436 |
oct | 7736155650145 |
9 | 1833271783378 |
10 | 545221202021 |
11 | 1a0255177931 |
12 | 89801588b45 |
13 | 3c54cb2a792 |
14 | 1c562dd348d |
15 | e2b0bb7c4b |
hex | 7ef1b75065 |
545221202021 has 8 divisors (see below), whose sum is σ = 577428597144. Its totient is φ = 513028869120.
The previous prime is 545221202017. The next prime is 545221202051. The reversal of 545221202021 is 120202122545.
It can be written as a sum of positive squares in 4 ways, for example, as 426134784100 + 119086417921 = 652790^2 + 345089^2 .
It is a sphenic number, since it is the product of 3 distinct primes.
It is a cyclic number.
It is not a de Polignac number, because 545221202021 - 22 = 545221202017 is a prime.
It is a Duffinian number.
It is a Curzon number.
It is a congruent number.
It is not an unprimeable number, because it can be changed into a prime (545221202051) by changing a digit.
It is a pernicious number, because its binary representation contains a prime number (23) of ones.
It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3690980 + ... + 3835853.
It is an arithmetic number, because the mean of its divisors is an integer number (72178574643).
Almost surely, 2545221202021 is an apocalyptic number.
It is an amenable number.
545221202021 is a deficient number, since it is larger than the sum of its proper divisors (32207395123).
545221202021 is a wasteful number, since it uses less digits than its factorization.
545221202021 is an odious number, because the sum of its binary digits is odd.
The sum of its prime factors is 7531111.
The product of its (nonzero) digits is 3200, while the sum is 26.
Adding to 545221202021 its reverse (120202122545), we get a palindrome (665423324566).
The spelling of 545221202021 in words is "five hundred forty-five billion, two hundred twenty-one million, two hundred two thousand, twenty-one".
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