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2144164231 = 111918895431
BaseRepresentation
bin111111111001101…
…0101100110000111
312112102121211101001
41333303111212013
513342401223411
6552432514131
7104064044446
oct17763254607
95472554331
102144164231
11a00363360
124ba0ab947
132822b1c41
14164aa4d5d
15c838cdc1
hex7fcd5987

2144164231 has 16 divisors (see below), whose sum is σ = 2463955200. Its totient is φ = 1845331200.

The previous prime is 2144164207. The next prime is 2144164247. The reversal of 2144164231 is 1324614412.

It is a cyclic number.

It is not a de Polignac number, because 2144164231 - 219 = 2143639943 is a prime.

It is a super-2 number, since 2×21441642312 = 9194880498999642722, which contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 2144164231.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2144164291) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 392086 + ... + 397516.

It is an arithmetic number, because the mean of its divisors is an integer number (153997200).

Almost surely, 22144164231 is an apocalyptic number.

2144164231 is a deficient number, since it is larger than the sum of its proper divisors (319790969).

2144164231 is a wasteful number, since it uses less digits than its factorization.

2144164231 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7350.

The product of its digits is 4608, while the sum is 28.

The square root of 2144164231 is about 46305.1210018935. The cubic root of 2144164231 is about 1289.4940689743.

Adding to 2144164231 its reverse (1324614412), we get a palindrome (3468778643).

It can be divided in two parts, 2144 and 164231, that added together give a cube (166375 = 553).

The spelling of 2144164231 in words is "two billion, one hundred forty-four million, one hundred sixty-four thousand, two hundred thirty-one".

Divisors: 1 11 19 209 1889 5431 20779 35891 59741 103189 394801 1135079 10259159 112850749 194924021 2144164231