231203227 has 2 divisors, whose sum is σ = 231203228. Its totient is φ = 231203226.

The previous prime is 231203207. The next prime is 231203249. The reversal of 231203227 is 722302132.

It is an a-pointer prime, because the next prime (231203249) can be obtained adding 231203227 to its sum of digits (22).

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 231203227 - 2¹⁹ = 230678939 is a prime.

It is equal to p_12705124 and since 231203227 and 12705124 have the same sum of digits, it is a Honaker prime.

It is a junction number, because it is equal to n+sod(n) for n = 231203198 and 231203207.

It is not a weakly prime, because it can be changed into another prime (231203207) 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 as a sum of consecutive naturals, namely, 115601613 + 115601614.

It is an arithmetic number, because the mean of its divisors is an integer number (115601614).

Almost surely, 2^231203227 is an apocalyptic number.

231203227 is a deficient number, since it is larger than the sum of its proper divisors (1).

231203227 is an equidigital number, since it uses as much as digits as its factorization.

231203227 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1008, while the sum is 22.

The square root of 231203227 is about 15205.3683612072. The cubic root of 231203227 is about 613.7591275433.

Adding to 231203227 its reverse (722302132), we get a palindrome (953505359).

The spelling of 231203227 in words is "two hundred thirty-one million, two hundred three thousand, two hundred twenty-seven".