Base | Representation |
---|---|
bin | 1100001010101… |
… | …0100011010001 |
3 | 10120000121022100 |
4 | 3002222203101 |
5 | 101030431400 |
6 | 5021431013 |
7 | 1156515111 |
oct | 302524321 |
9 | 116017270 |
10 | 51030225 |
11 | 26894844 |
12 | 1510b469 |
13 | a7592cc |
14 | 6ac5041 |
15 | 4730100 |
hex | 30aa8d1 |
51030225 has 36 divisors (see below), whose sum is σ = 91808236. Its totient is φ = 27095040.
The previous prime is 51030223. The next prime is 51030233. The reversal of 51030225 is 52203015.
51030225 = T1 + T2 + ... + T673.
It is a happy number.
51030225 is a nontrivial binomial coefficient, being equal to C(675, 3).
It can be written as a sum of positive squares in 6 ways, for example, as 5992704 + 45037521 = 2448^2 + 6711^2 .
It is not a de Polignac number, because 51030225 - 21 = 51030223 is a prime.
It is a Curzon number.
It is a junction number, because it is equal to n+sod(n) for n = 51030198 and 51030207.
It is not an unprimeable number, because it can be changed into a prime (51030223) by changing a digit.
It is the 673-rd tetrahedral number.
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 35 ways as a sum of consecutive naturals, for example, 75489 + ... + 76161.
Almost surely, 251030225 is an apocalyptic number.
It is an amenable number.
51030225 is a deficient number, since it is larger than the sum of its proper divisors (40778011).
51030225 is a wasteful number, since it uses less digits than its factorization.
51030225 is an odious number, because the sum of its binary digits is odd.
The sum of its prime factors is 1026 (or 1018 counting only the distinct ones).
The product of its (nonzero) digits is 300, while the sum is 18.
The square root of 51030225 is about 7143.5442883767. The cubic root of 51030225 is about 370.9162221255.
The spelling of 51030225 in words is "fifty-one million, thirty thousand, two hundred twenty-five".
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