1232231209 has 12 divisors (see below), whose sum is σ = 1367859780. Its totient is φ = 1109108000.

The previous prime is 1232231207. The next prime is 1232231219. The reversal of 1232231209 is 9021322321.

It can be written as a sum of positive squares in 2 ways, for example, as 611473984 + 620757225 = 24728^2 + 24915^2 .

It is not a de Polignac number, because 1232231209 - 2¹ = 1232231207 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1232231201) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 38194 + ... + 62635.

It is an arithmetic number, because the mean of its divisors is an integer number (113988315).

Almost surely, 2^1232231209 is an apocalyptic number.

It is an amenable number.

1232231209 is a deficient number, since it is larger than the sum of its proper divisors (135628571).

1232231209 is a wasteful number, since it uses less digits than its factorization.

1232231209 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 100952 (or 100941 counting only the distinct ones).

The product of its (nonzero) digits is 1296, while the sum is 25.

The square root of 1232231209 is about 35103.1509839217. The cubic root of 1232231209 is about 1072.0887399738.

The spelling of 1232231209 in words is "one billion, two hundred thirty-two million, two hundred thirty-one thousand, two hundred nine".