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51853766141 = 172130130021
BaseRepresentation
bin110000010010101110…
…011010110111111101
311221211210000020201002
4300102232122313331
51322144031004031
635453222100045
73513661511522
oct602256326775
9157753006632
1051853766141
111aa9a10aa91
12a07187a625
134b74b36478
14271ca01149
1515374bdccb
hexc12b9adfd

51853766141 has 4 divisors (see below), whose sum is σ = 51883897884. Its totient is φ = 51823634400.

The previous prime is 51853766131. The next prime is 51853766207. The reversal of 51853766141 is 14166735815.

It is a happy number.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 48061792900 + 3791973241 = 219230^2 + 61579^2 .

It is a cyclic number.

It is not a de Polignac number, because 51853766141 - 218 = 51853503997 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51853766131) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 15063290 + ... + 15066731.

It is an arithmetic number, because the mean of its divisors is an integer number (12970974471).

Almost surely, 251853766141 is an apocalyptic number.

It is an amenable number.

51853766141 is a deficient number, since it is larger than the sum of its proper divisors (30131743).

51853766141 is a wasteful number, since it uses less digits than its factorization.

51853766141 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 30131742.

The product of its digits is 604800, while the sum is 47.

The spelling of 51853766141 in words is "fifty-one billion, eight hundred fifty-three million, seven hundred sixty-six thousand, one hundred forty-one".

Divisors: 1 1721 30130021 51853766141