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51180260 = 2252559013
BaseRepresentation
bin1100001100111…
…1001011100100
310120022020010012
43003033023210
5101100232020
65024545352
71161011405
oct303171344
9116266105
1051180260
112698753a
1215182258
13a7ac6a1
146b239ac
15475e7c5
hex30cf2e4

51180260 has 12 divisors (see below), whose sum is σ = 107478588. Its totient is φ = 20472096.

The previous prime is 51180253. The next prime is 51180263. The reversal of 51180260 is 6208115.

51180260 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 2 ways, for example, as 8904256 + 42276004 = 2984^2 + 6502^2 .

It is not an unprimeable number, because it can be changed into a prime (51180263) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1279487 + ... + 1279526.

It is an arithmetic number, because the mean of its divisors is an integer number (8956549).

Almost surely, 251180260 is an apocalyptic number.

It is an amenable number.

51180260 is an abundant number, since it is smaller than the sum of its proper divisors (56298328).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

51180260 is a wasteful number, since it uses less digits than its factorization.

51180260 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2559022 (or 2559020 counting only the distinct ones).

The product of its (nonzero) digits is 480, while the sum is 23.

The square root of 51180260 is about 7154.0380205867. The cubic root of 51180260 is about 371.2793792196.

Adding to 51180260 its reverse (6208115), we get a palindrome (57388375).

The spelling of 51180260 in words is "fifty-one million, one hundred eighty thousand, two hundred sixty".

Divisors: 1 2 4 5 10 20 2559013 5118026 10236052 12795065 25590130 51180260