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231248860 = 22511562443
BaseRepresentation
bin11011100100010…
…01001111011100
3121010010122210121
431302021033130
5433144430420
634540244324
75505403633
oct1562111734
9533118717
10231248860
11109596767
12655406a4
1338ba885b
14229d851a
151547d2aa
hexdc893dc

231248860 has 12 divisors (see below), whose sum is σ = 485622648. Its totient is φ = 92499536.

The previous prime is 231248851. The next prime is 231248861. The reversal of 231248860 is 68842132.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (231248861) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5781202 + ... + 5781241.

It is an arithmetic number, because the mean of its divisors is an integer number (40468554).

Almost surely, 2231248860 is an apocalyptic number.

231248860 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

231248860 is an abundant number, since it is smaller than the sum of its proper divisors (254373788).

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

231248860 is a wasteful number, since it uses less digits than its factorization.

231248860 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11562452 (or 11562450 counting only the distinct ones).

The product of its (nonzero) digits is 18432, while the sum is 34.

The square root of 231248860 is about 15206.8688427302. The cubic root of 231248860 is about 613.7995044709.

The spelling of 231248860 in words is "two hundred thirty-one million, two hundred forty-eight thousand, eight hundred sixty".

Divisors: 1 2 4 5 10 20 11562443 23124886 46249772 57812215 115624430 231248860