231244249 has 2 divisors, whose sum is σ = 231244250. Its totient is φ = 231244248.

The previous prime is 231244243. The next prime is 231244261. The reversal of 231244249 is 942442132.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 219988224 + 11256025 = 14832^2 + 3355^2 .

It is a cyclic number.

It is not a de Polignac number, because 231244249 - 2⁷ = 231244121 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 231244249.

It is not a weakly prime, because it can be changed into another prime (231244243) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 115622124 + 115622125.

It is an arithmetic number, because the mean of its divisors is an integer number (115622125).

Almost surely, 2^231244249 is an apocalyptic number.

It is an amenable number.

231244249 is a deficient number, since it is larger than the sum of its proper divisors (1).

231244249 is an equidigital number, since it uses as much as digits as its factorization.

231244249 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 13824, while the sum is 31.

The square root of 231244249 is about 15206.7172328547. The cubic root of 231244249 is about 613.7954248135.

The spelling of 231244249 in words is "two hundred thirty-one million, two hundred forty-four thousand, two hundred forty-nine".