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231240310 = 25749631
BaseRepresentation
bin11011100100001…
…11001001110110
3121010010020001221
431302013021312
5433144142220
634540140554
75505340000
oct1562071166
9533106057
10231240310
111095902a4
126553775a
1338ba49b2
14229d5370
151547a9aa
hexdc87276

231240310 has 40 divisors (see below), whose sum is σ = 485626176. Its totient is φ = 79274160.

The previous prime is 231240281. The next prime is 231240311. The reversal of 231240310 is 13042132.

It is a happy number.

It is a super-2 number, since 2×2312403102 = 106944161937792200, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (231240311) by changing a digit.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 19195 + ... + 28825.

Almost surely, 2231240310 is an apocalyptic number.

231240310 is an abundant number, since it is smaller than the sum of its proper divisors (254385866).

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

231240310 is an frugal number, since it uses more digits than its factorization.

231240310 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9666 (or 9645 counting only the distinct ones).

The product of its (nonzero) digits is 144, while the sum is 16.

The square root of 231240310 is about 15206.5877171705. The cubic root of 231240310 is about 613.7919396762.

Adding to 231240310 its reverse (13042132), we get a palindrome (244282442).

The spelling of 231240310 in words is "two hundred thirty-one million, two hundred forty thousand, three hundred ten".

Divisors: 1 2 5 7 10 14 35 49 70 98 245 343 490 686 1715 2401 3430 4802 9631 12005 19262 24010 48155 67417 96310 134834 337085 471919 674170 943838 2359595 3303433 4719190 6606866 16517165 23124031 33034330 46248062 115620155 231240310