232031209 has 2 divisors, whose sum is σ = 232031210. Its totient is φ = 232031208.

The previous prime is 232031201. The next prime is 232031221. The reversal of 232031209 is 902130232.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 136539225 + 95491984 = 11685^2 + 9772^2 .

It is a cyclic number.

It is not a de Polignac number, because 232031209 - 2³ = 232031201 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 232031209.

It is not a weakly prime, because it can be changed into another prime (232031201) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 116015604 + 116015605.

It is an arithmetic number, because the mean of its divisors is an integer number (116015605).

Almost surely, 2^232031209 is an apocalyptic number.

It is an amenable number.

232031209 is a deficient number, since it is larger than the sum of its proper divisors (1).

232031209 is an equidigital number, since it uses as much as digits as its factorization.

232031209 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 648, while the sum is 22.

The square root of 232031209 is about 15232.5706628921. The cubic root of 232031209 is about 614.4909167569.

The spelling of 232031209 in words is "two hundred thirty-two million, thirty-one thousand, two hundred nine".