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51157745 = 543277859
BaseRepresentation
bin1100001100100…
…1101011110001
310120021002020022
43003021223301
5101044021440
65024253225
71160555642
oct303115361
9116232208
1051157745
1126971631
1215171215
13a7a2372
146b196c9
154757cb5
hex30c9af1

51157745 has 16 divisors (see below), whose sum is σ = 63117120. Its totient is φ = 39783744.

The previous prime is 51157739. The next prime is 51157751. The reversal of 51157745 is 54775115.

51157745 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is an interprime number because it is at equal distance from previous prime (51157739) and next prime (51157751).

It is a cyclic number.

It is not a de Polignac number, because 51157745 - 28 = 51157489 is a prime.

It is a super-2 number, since 2×511577452 = 5234229746970050, which contains 22 as substring.

It is a Curzon number.

It is an unprimeable number.

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 15 ways as a sum of consecutive naturals, for example, 59126 + ... + 59984.

It is an arithmetic number, because the mean of its divisors is an integer number (3944820).

Almost surely, 251157745 is an apocalyptic number.

It is an amenable number.

51157745 is a deficient number, since it is larger than the sum of its proper divisors (11959375).

51157745 is a wasteful number, since it uses less digits than its factorization.

51157745 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1184.

The product of its digits is 24500, while the sum is 35.

The square root of 51157745 is about 7152.4642606587. The cubic root of 51157745 is about 371.2249273578.

The spelling of 51157745 in words is "fifty-one million, one hundred fifty-seven thousand, seven hundred forty-five".

Divisors: 1 5 43 215 277 859 1385 4295 11911 36937 59555 184685 237943 1189715 10231549 51157745