231644449 has 2 divisors, whose sum is σ = 231644450. Its totient is φ = 231644448.

The previous prime is 231644429. The next prime is 231644453. The reversal of 231644449 is 944446132.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 217356049 + 14288400 = 14743^2 + 3780^2 .

It is a cyclic number.

It is not a de Polignac number, because 231644449 - 2⁵ = 231644417 is a prime.

It is not a weakly prime, because it can be changed into another prime (231644429) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 115822224 + 115822225.

It is an arithmetic number, because the mean of its divisors is an integer number (115822225).

Almost surely, 2^231644449 is an apocalyptic number.

It is an amenable number.

231644449 is a deficient number, since it is larger than the sum of its proper divisors (1).

231644449 is an equidigital number, since it uses as much as digits as its factorization.

231644449 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 82944, while the sum is 37.

The square root of 231644449 is about 15219.8702031259. The cubic root of 231644449 is about 614.1493065656.

It can be divided in two parts, 231 and 644449, that added together give a triangular number (644680 = T₁₁₃₅).

The spelling of 231644449 in words is "two hundred thirty-one million, six hundred forty-four thousand, four hundred forty-nine".