231340229 has 2 divisors, whose sum is σ = 231340230. Its totient is φ = 231340228.

The previous prime is 231340171. The next prime is 231340253. The reversal of 231340229 is 922043132.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 201583204 + 29757025 = 14198^2 + 5455^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-231340229 is a prime.

It is a Chen prime.

It is a junction number, because it is equal to n+sod(n) for n = 231340198 and 231340207.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (231340429) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 115670114 + 115670115.

It is an arithmetic number, because the mean of its divisors is an integer number (115670115).

Almost surely, 2^231340229 is an apocalyptic number.

It is an amenable number.

231340229 is a deficient number, since it is larger than the sum of its proper divisors (1).

231340229 is an equidigital number, since it uses as much as digits as its factorization.

231340229 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 2592, while the sum is 26.

The square root of 231340229 is about 15209.8727476597. The cubic root of 231340229 is about 613.8803334997.

The spelling of 231340229 in words is "two hundred thirty-one million, three hundred forty thousand, two hundred twenty-nine".