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230786331 = 31918232221
BaseRepresentation
bin11011100000110…
…00010100011011
3121002021011022220
431300120110123
5433040130311
634522315123
75501436306
oct1560302433
9532234286
10230786331
11109300206
1265358aa3
1338a76179
1422917b3d
15153db206
hexdc1851b

230786331 has 16 divisors (see below), whose sum is σ = 324234240. Its totient is φ = 145614240.

The previous prime is 230786299. The next prime is 230786359. The reversal of 230786331 is 133687032.

It is not a de Polignac number, because 230786331 - 25 = 230786299 is a prime.

It is a super-2 number, since 2×2307863312 = 106524661152883122, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 230786292 and 230786301.

It is not an unprimeable number, because it can be changed into a prime (230746331) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 102801 + ... + 105021.

It is an arithmetic number, because the mean of its divisors is an integer number (20264640).

Almost surely, 2230786331 is an apocalyptic number.

230786331 is a deficient number, since it is larger than the sum of its proper divisors (93447909).

230786331 is a wasteful number, since it uses less digits than its factorization.

230786331 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4066.

The product of its (nonzero) digits is 18144, while the sum is 33.

The square root of 230786331 is about 15191.6533333275. The cubic root of 230786331 is about 613.3900039857.

The spelling of 230786331 in words is "two hundred thirty million, seven hundred eighty-six thousand, three hundred thirty-one".

Divisors: 1 3 19 57 1823 2221 5469 6663 34637 42199 103911 126597 4048883 12146649 76928777 230786331