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230123213 is a prime number
BaseRepresentation
bin11011011011101…
…10011011001101
3121001000110200222
431231312123031
5432402420323
634500201125
75463005105
oct1555663315
9531013628
10230123213
11108997a81
12650991a5
13388a33a8
14227c4205
15153099c8
hexdb766cd

230123213 has 2 divisors, whose sum is σ = 230123214. Its totient is φ = 230123212.

The previous prime is 230123189. The next prime is 230123251. The reversal of 230123213 is 312321032.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 200562244 + 29560969 = 14162^2 + 5437^2 .

It is a cyclic number.

It is not a de Polignac number, because 230123213 - 214 = 230106829 is a prime.

It is a super-2 number, since 2×2301232132 = 105913386322886738, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 230123191 and 230123200.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (230123263) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 115061606 + 115061607.

It is an arithmetic number, because the mean of its divisors is an integer number (115061607).

Almost surely, 2230123213 is an apocalyptic number.

It is an amenable number.

230123213 is a deficient number, since it is larger than the sum of its proper divisors (1).

230123213 is an equidigital number, since it uses as much as digits as its factorization.

230123213 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 216, while the sum is 17.

The square root of 230123213 is about 15169.8125565216. The cubic root of 230123213 is about 612.8019562371.

Adding to 230123213 its reverse (312321032), we get a palindrome (542444245).

The spelling of 230123213 in words is "two hundred thirty million, one hundred twenty-three thousand, two hundred thirteen".