231203117 has 2 divisors, whose sum is σ = 231203118. Its totient is φ = 231203116.

The previous prime is 231203087. The next prime is 231203129. The reversal of 231203117 is 711302132.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 117375556 + 113827561 = 10834^2 + 10669^2 .

It is a cyclic number.

It is not a de Polignac number, because 231203117 - 2¹⁰ = 231202093 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (231203717) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 115601558 + 115601559.

It is an arithmetic number, because the mean of its divisors is an integer number (115601559).

Almost surely, 2^231203117 is an apocalyptic number.

It is an amenable number.

231203117 is a deficient number, since it is larger than the sum of its proper divisors (1).

231203117 is an equidigital number, since it uses as much as digits as its factorization.

231203117 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 252, while the sum is 20.

The square root of 231203117 is about 15205.3647440632. The cubic root of 231203117 is about 613.7590302069.

Adding to 231203117 its reverse (711302132), we get a palindrome (942505249).

The spelling of 231203117 in words is "two hundred thirty-one million, two hundred three thousand, one hundred seventeen".