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231430230 = 23355471567
BaseRepresentation
bin11011100101101…
…01100001010110
3121010110212121000
431302311201112
5433221231410
634544204130
75510060463
oct1562654126
9533425530
10231430230
111096aaa59
1265609646
1338c40285
1422a4466a
15154b6dc0
hexdcb5856

231430230 has 64 divisors (see below), whose sum is σ = 618670080. Its totient is φ = 61562592.

The previous prime is 231430219. The next prime is 231430247. The reversal of 231430230 is 32034132.

231430230 is a `hidden beast` number, since 2 + 3 + 1 + 430 + 230 = 666.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 146907 + ... + 148473.

It is an arithmetic number, because the mean of its divisors is an integer number (9666720).

Almost surely, 2231430230 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 231430230, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (309335040).

231430230 is an abundant number, since it is smaller than the sum of its proper divisors (387239850).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

231430230 is a wasteful number, since it uses less digits than its factorization.

231430230 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2130 (or 2124 counting only the distinct ones).

The product of its (nonzero) digits is 432, while the sum is 18.

The square root of 231430230 is about 15212.8310974651. The cubic root of 231430230 is about 613.9599315313.

Adding to 231430230 its reverse (32034132), we get a palindrome (263464362).

The spelling of 231430230 in words is "two hundred thirty-one million, four hundred thirty thousand, two hundred thirty".

Divisors: 1 2 3 5 6 9 10 15 18 27 30 45 54 90 135 270 547 1094 1567 1641 2735 3134 3282 4701 4923 5470 7835 8205 9402 9846 14103 14769 15670 16410 23505 24615 28206 29538 42309 47010 49230 70515 73845 84618 141030 147690 211545 423090 857149 1714298 2571447 4285745 5142894 7714341 8571490 12857235 15428682 23143023 25714470 38571705 46286046 77143410 115715115 231430230