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13031230 = 257317851
BaseRepresentation
bin110001101101…
…011100111110
3220112001111011
4301231130332
511313444410
61143145434
7215522632
oct61553476
926461434
1013031230
1173a0613
12444527a
1329134b4
141a32dc2
15122618a
hexc6d73e

13031230 has 16 divisors (see below), whose sum is σ = 23778864. Its totient is φ = 5140800.

The previous prime is 13031201. The next prime is 13031233. The reversal of 13031230 is 3213031.

It is a self number, because there is not a number n which added to its sum of digits gives 13031230.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13031233) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 8196 + ... + 9655.

It is an arithmetic number, because the mean of its divisors is an integer number (1486179).

Almost surely, 213031230 is an apocalyptic number.

13031230 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

13031230 is a deficient number, since it is larger than the sum of its proper divisors (10747634).

13031230 is a wasteful number, since it uses less digits than its factorization.

13031230 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17931.

The product of its (nonzero) digits is 54, while the sum is 13.

The square root of 13031230 is about 3609.8794993739. The cubic root of 13031230 is about 235.3216058449.

Adding to 13031230 its reverse (3213031), we get a palindrome (16244261).

The spelling of 13031230 in words is "thirteen million, thirty-one thousand, two hundred thirty".

Divisors: 1 2 5 10 73 146 365 730 17851 35702 89255 178510 1303123 2606246 6515615 13031230