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230142143 = 71141269271
BaseRepresentation
bin11011011011110…
…11000010111111
3121001001102200002
431231323002333
5432404022033
634500424515
75463114230
oct1555730277
9531042602
10230142143
11108a00220
12650a813b
13388abbaa
14227cb087
15153103e8
hexdb7b0bf

230142143 has 32 divisors (see below), whose sum is σ = 296110080. Its totient is φ = 173664000.

The previous prime is 230142139. The next prime is 230142167. The reversal of 230142143 is 341241032.

It is a cyclic number.

It is not a de Polignac number, because 230142143 - 22 = 230142139 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (230142113) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 849098 + ... + 849368.

It is an arithmetic number, because the mean of its divisors is an integer number (9253440).

Almost surely, 2230142143 is an apocalyptic number.

230142143 is a deficient number, since it is larger than the sum of its proper divisors (65967937).

230142143 is a wasteful number, since it uses less digits than its factorization.

230142143 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 599.

The product of its (nonzero) digits is 576, while the sum is 20.

The square root of 230142143 is about 15170.4364802072. The cubic root of 230142143 is about 612.8187588632.

Adding to 230142143 its reverse (341241032), we get a palindrome (571383175).

It can be divided in two parts, 2301 and 42143, that added together give a palindrome (44444).

The spelling of 230142143 in words is "two hundred thirty million, one hundred forty-two thousand, one hundred forty-three".

Divisors: 1 7 11 41 77 269 271 287 451 1883 1897 2959 2981 3157 11029 11111 20713 20867 72899 77203 77777 121319 122221 510293 801889 849233 855547 2988859 5613223 20922013 32877449 230142143