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230112031 = 251916781
BaseRepresentation
bin11011011011100…
…11101100011111
3121000222220100211
431231303230133
5432402041111
634500033251
75462630362
oct1555635437
9530886324
10230112031
1110898a636
1265092827
133889b286
14227c00d9
1515306521
hexdb73b1f

230112031 has 4 divisors (see below), whose sum is σ = 231029064. Its totient is φ = 229195000.

The previous prime is 230112019. The next prime is 230112041. The reversal of 230112031 is 130211032.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 230112031 - 221 = 228014879 is a prime.

It is a super-2 number, since 2×2301120312 = 105903093621889922, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (230112011) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 458140 + ... + 458641.

It is an arithmetic number, because the mean of its divisors is an integer number (57757266).

Almost surely, 2230112031 is an apocalyptic number.

230112031 is a deficient number, since it is larger than the sum of its proper divisors (917033).

230112031 is an equidigital number, since it uses as much as digits as its factorization.

230112031 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 917032.

The product of its (nonzero) digits is 36, while the sum is 13.

The square root of 230112031 is about 15169.4439911290. The cubic root of 230112031 is about 612.7920304494.

Adding to 230112031 its reverse (130211032), we get a palindrome (360323063).

Subtracting from 230112031 its reverse (130211032), we obtain a palindrome (99900999).

The spelling of 230112031 in words is "two hundred thirty million, one hundred twelve thousand, thirty-one".

Divisors: 1 251 916781 230112031