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51161827 = 426112007
BaseRepresentation
bin1100001100101…
…0101011100011
310120021021211111
43003022223203
5101044134302
65024324151
71160603563
oct303125343
9116237744
1051161827
1126974702
1215173657
13a7a4192
146b1ada3
1547590d7
hex30caae3

51161827 has 4 divisors (see below), whose sum is σ = 51178096. Its totient is φ = 51145560.

The previous prime is 51161807. The next prime is 51161837. The reversal of 51161827 is 72816115.

51161827 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 72816115 = 514563223.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2k-51161827 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (51161807) 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, 1743 + ... + 10264.

It is an arithmetic number, because the mean of its divisors is an integer number (12794524).

Almost surely, 251161827 is an apocalyptic number.

51161827 is a deficient number, since it is larger than the sum of its proper divisors (16269).

51161827 is a wasteful number, since it uses less digits than its factorization.

51161827 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16268.

The product of its digits is 3360, while the sum is 31.

The square root of 51161827 is about 7152.7496111635. The cubic root of 51161827 is about 371.2348007397.

The spelling of 51161827 in words is "fifty-one million, one hundred sixty-one thousand, eight hundred twenty-seven".

Divisors: 1 4261 12007 51161827