231453109 has 2 divisors, whose sum is σ = 231453110. Its totient is φ = 231453108.

The previous prime is 231453083. The next prime is 231453151. The reversal of 231453109 is 901354132.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 169390225 + 62062884 = 13015^2 + 7878^2 .

It is a cyclic number.

It is not a de Polignac number, because 231453109 - 2⁹ = 231452597 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (231456109) 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, 115726554 + 115726555.

It is an arithmetic number, because the mean of its divisors is an integer number (115726555).

Almost surely, 2^231453109 is an apocalyptic number.

It is an amenable number.

231453109 is a deficient number, since it is larger than the sum of its proper divisors (1).

231453109 is an equidigital number, since it uses as much as digits as its factorization.

231453109 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 3240, while the sum is 28.

The square root of 231453109 is about 15213.5830427944. The cubic root of 231453109 is about 613.9801627207.

The spelling of 231453109 in words is "two hundred thirty-one million, four hundred fifty-three thousand, one hundred nine".