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51382825 = 5213374273
BaseRepresentation
bin1100010000000…
…0101000101001
310120200111222121
43010000220221
5101123222300
65033151241
71162514104
oct304005051
9116614877
1051382825
112700574a
121525b521
13a850950
146b7773b
15479e81a
hex3100a29

51382825 has 24 divisors (see below), whose sum is σ = 70486808. Its totient is φ = 36910080.

The previous prime is 51382813. The next prime is 51382829. The reversal of 51382825 is 52828315.

It can be divided in two parts, 513 and 82825, that added together give a palindrome (83338).

It can be written as a sum of positive squares in 12 ways, for example, as 17405584 + 33977241 = 4172^2 + 5829^2 .

It is not a de Polignac number, because 51382825 - 213 = 51374633 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (51382829) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 9889 + ... + 14161.

Almost surely, 251382825 is an apocalyptic number.

It is an amenable number.

51382825 is a deficient number, since it is larger than the sum of its proper divisors (19103983).

51382825 is a wasteful number, since it uses less digits than its factorization.

51382825 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4333 (or 4328 counting only the distinct ones).

The product of its digits is 19200, while the sum is 34.

The square root of 51382825 is about 7168.1814290655. The cubic root of 51382825 is about 371.7685600321.

The spelling of 51382825 in words is "fifty-one million, three hundred eighty-two thousand, eight hundred twenty-five".

Divisors: 1 5 13 25 37 65 185 325 481 925 2405 4273 12025 21365 55549 106825 158101 277745 790505 1388725 2055313 3952525 10276565 51382825