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230231231 = 943324407
BaseRepresentation
bin11011011100100…
…00110010111111
3121001012221212122
431232100302333
5432414344411
634502353155
75463635036
oct1556206277
9531187778
10230231231
11108a6114a
126512b7bb
13389105c9
142281171d
151532b9db
hexdb90cbf

230231231 has 4 divisors (see below), whose sum is σ = 230265072. Its totient is φ = 230197392.

The previous prime is 230231171. The next prime is 230231233. The reversal of 230231231 is 132132032.

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 230231231 - 218 = 229969087 is a prime.

It is a super-2 number, since 2×2302312312 = 106012839455550722, 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 (230231233) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2771 + ... + 21636.

It is an arithmetic number, because the mean of its divisors is an integer number (57566268).

Almost surely, 2230231231 is an apocalyptic number.

230231231 is a deficient number, since it is larger than the sum of its proper divisors (33841).

230231231 is an equidigital number, since it uses as much as digits as its factorization.

230231231 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 33840.

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

The square root of 230231231 is about 15173.3724333122. The cubic root of 230231231 is about 612.8978226885.

Adding to 230231231 its reverse (132132032), we get a palindrome (362363263).

It can be divided in two parts, 2302 and 31231, that added together give a palindrome (33533).

The spelling of 230231231 in words is "two hundred thirty million, two hundred thirty-one thousand, two hundred thirty-one".

Divisors: 1 9433 24407 230231231