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51030225 = 3252337673
BaseRepresentation
bin1100001010101…
…0100011010001
310120000121022100
43002222203101
5101030431400
65021431013
71156515111
oct302524321
9116017270
1051030225
1126894844
121510b469
13a7592cc
146ac5041
154730100
hex30aa8d1

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".

Divisors: 1 3 5 9 15 25 45 75 225 337 673 1011 1685 2019 3033 3365 5055 6057 8425 10095 15165 16825 25275 30285 50475 75825 151425 226801 680403 1134005 2041209 3402015 5670025 10206045 17010075 51030225