231831449 has 2 divisors, whose sum is σ = 231831450. Its totient is φ = 231831448.

The previous prime is 231831437. The next prime is 231831493. The reversal of 231831449 is 944138132.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 228221449 + 3610000 = 15107^2 + 1900^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-231831449 is a prime.

It is a Chen prime.

It is equal to p_12737744 and since 231831449 and 12737744 have the same sum of digits, it is a Honaker prime.

It is not a weakly prime, because it can be changed into another prime (231831419) 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, 115915724 + 115915725.

It is an arithmetic number, because the mean of its divisors is an integer number (115915725).

Almost surely, 2^231831449 is an apocalyptic number.

It is an amenable number.

231831449 is a deficient number, since it is larger than the sum of its proper divisors (1).

231831449 is an equidigital number, since it uses as much as digits as its factorization.

231831449 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 20736, while the sum is 35.

The square root of 231831449 is about 15226.0122487800. The cubic root of 231831449 is about 614.3145238928.

The spelling of 231831449 in words is "two hundred thirty-one million, eight hundred thirty-one thousand, four hundred forty-nine".