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230120513 = 7210743891
BaseRepresentation
bin11011011011101…
…01110001000001
3121001000022222222
431231311301001
5432402324023
634500140425
75462664200
oct1555656101
9531008888
10230120513
11108995a47
1265097715
13388a20ac
14227c3237
1515308cc8
hexdb75c41

230120513 has 12 divisors (see below), whose sum is σ = 270199152. Its totient is φ = 195398280.

The previous prime is 230120467. The next prime is 230120531. The reversal of 230120513 is 315021032.

It is not a de Polignac number, because 230120513 - 210 = 230119489 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 230120491 and 230120500.

It is not an unprimeable number, because it can be changed into a prime (230120593) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 16703 + ... + 27188.

It is an arithmetic number, because the mean of its divisors is an integer number (22516596).

Almost surely, 2230120513 is an apocalyptic number.

It is an amenable number.

230120513 is a deficient number, since it is larger than the sum of its proper divisors (40078639).

230120513 is a wasteful number, since it uses less digits than its factorization.

230120513 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 44012 (or 44005 counting only the distinct ones).

The product of its (nonzero) digits is 180, while the sum is 17.

The square root of 230120513 is about 15169.7235637305. The cubic root of 230120513 is about 612.7995595909.

Adding to 230120513 its reverse (315021032), we get a palindrome (545141545).

The spelling of 230120513 in words is "two hundred thirty million, one hundred twenty thousand, five hundred thirteen".

Divisors: 1 7 49 107 749 5243 43891 307237 2150659 4696337 32874359 230120513