231342229 has 2 divisors, whose sum is σ = 231342230. Its totient is φ = 231342228.

The previous prime is 231342227. The next prime is 231342253. The reversal of 231342229 is 922243132.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 198049329 + 33292900 = 14073^2 + 5770^2 .

It is a cyclic number.

It is not a de Polignac number, because 231342229 - 2¹ = 231342227 is a prime.

Together with 231342227, it forms a pair of twin primes.

It is a Chen prime.

It is a junction number, because it is equal to n+sod(n) for n = 231342197 and 231342206.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (231342227) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 115671114 + 115671115.

It is an arithmetic number, because the mean of its divisors is an integer number (115671115).

Almost surely, 2^231342229 is an apocalyptic number.

It is an amenable number.

231342229 is a deficient number, since it is larger than the sum of its proper divisors (1).

231342229 is an equidigital number, since it uses as much as digits as its factorization.

231342229 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 5184, while the sum is 28.

The square root of 231342229 is about 15209.9384942872. The cubic root of 231342229 is about 613.8821025494.

The spelling of 231342229 in words is "two hundred thirty-one million, three hundred forty-two thousand, two hundred twenty-nine".