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51256537 is a prime number
BaseRepresentation
bin1100001110000…
…1110011011001
310120110002202021
43003201303121
5101110202122
65030334441
71161446653
oct303416331
9116402667
1051256537
1126a29882
12151ba421
13a808317
146b436d3
1547771c7
hex30e1cd9

51256537 has 2 divisors, whose sum is σ = 51256538. Its totient is φ = 51256536.

The previous prime is 51256529. The next prime is 51256549. The reversal of 51256537 is 73565215.

51256537 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 32080896 + 19175641 = 5664^2 + 4379^2 .

It is a cyclic number.

It is not a de Polignac number, because 51256537 - 23 = 51256529 is a prime.

It is not a weakly prime, because it can be changed into another prime (51256577) 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 as a sum of consecutive naturals, namely, 25628268 + 25628269.

It is an arithmetic number, because the mean of its divisors is an integer number (25628269).

Almost surely, 251256537 is an apocalyptic number.

It is an amenable number.

51256537 is a deficient number, since it is larger than the sum of its proper divisors (1).

51256537 is an equidigital number, since it uses as much as digits as its factorization.

51256537 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 31500, while the sum is 34.

The square root of 51256537 is about 7159.3670809646. The cubic root of 51256537 is about 371.4637342802.

The spelling of 51256537 in words is "fifty-one million, two hundred fifty-six thousand, five hundred thirty-seven".