Search a number
-
+
231234471 = 321310131951
BaseRepresentation
bin11011100100001…
…01101110100111
3121010002221001200
431302011232213
5433144000341
634540053543
75505313656
oct1562055647
9533087050
10231234471
11109586976
12655342b3
1338ba2140
14229d319d
1515478db6
hexdc85ba7

231234471 has 24 divisors (see below), whose sum is σ = 360237696. Its totient is φ = 142084800.

The previous prime is 231234457. The next prime is 231234473. The reversal of 231234471 is 174432132.

It is a happy number.

231234471 is a `hidden beast` number, since 2 + 312 + 344 + 7 + 1 = 666.

It is not a de Polignac number, because 231234471 - 210 = 231233447 is a prime.

It is a super-3 number, since 3×2312344713 (a number of 26 digits) contains 333 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (231234473) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 117546 + ... + 119496.

It is an arithmetic number, because the mean of its divisors is an integer number (15009904).

Almost surely, 2231234471 is an apocalyptic number.

231234471 is a deficient number, since it is larger than the sum of its proper divisors (129003225).

231234471 is a wasteful number, since it uses less digits than its factorization.

231234471 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2983 (or 2980 counting only the distinct ones).

The product of its digits is 4032, while the sum is 27.

The square root of 231234471 is about 15206.3957267986. The cubic root of 231234471 is about 613.7867733894.

The spelling of 231234471 in words is "two hundred thirty-one million, two hundred thirty-four thousand, four hundred seventy-one".

Divisors: 1 3 9 13 39 117 1013 1951 3039 5853 9117 13169 17559 25363 39507 76089 118521 228267 1976363 5929089 17787267 25692719 77078157 231234471