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231312310111 = 4759197423431
BaseRepresentation
bin1101011101101101001…
…0011011111101011111
3211010001112220211220201
43113123102123331133
512242211422410421
6254132521324331
722466064123601
oct3273322337537
9733045824821
10231312310111
118a10a850243
12389b60366a7
1318a7453c41c
14b2a4933171
15603c3c0b91
hex35db49bf5f

231312310111 has 16 divisors (see below), whose sum is σ = 241457863680. Its totient is φ = 221423403040.

The previous prime is 231312310091. The next prime is 231312310123. The reversal of 231312310111 is 111013213132.

It is a cyclic number.

It is not a de Polignac number, because 231312310111 - 25 = 231312310079 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (231312310711) 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, 334566 + ... + 757996.

It is an arithmetic number, because the mean of its divisors is an integer number (15091116480).

Almost surely, 2231312310111 is an apocalyptic number.

231312310111 is a deficient number, since it is larger than the sum of its proper divisors (10145553569).

231312310111 is a wasteful number, since it uses less digits than its factorization.

231312310111 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 423734.

The product of its (nonzero) digits is 108, while the sum is 19.

Adding to 231312310111 its reverse (111013213132), we get a palindrome (342325523243).

The spelling of 231312310111 in words is "two hundred thirty-one billion, three hundred twelve million, three hundred ten thousand, one hundred eleven".

Divisors: 1 47 59 197 2773 9259 11623 423431 546281 19901257 24982429 83415907 1174174163 3920547629 4921538513 231312310111