231990208 has 14 divisors (see below), whose sum is σ = 460355696. Its totient is φ = 115995072.

The previous prime is 231990197. The next prime is 231990217. The reversal of 231990208 is 802099132.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1812360 + ... + 1812487.

Almost surely, 2^231990208 is an apocalyptic number.

It is an amenable number.

231990208 is a deficient number, since it is larger than the sum of its proper divisors (228365488).

231990208 is an equidigital number, since it uses as much as digits as its factorization.

231990208 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3624859 (or 3624849 counting only the distinct ones).

The product of its (nonzero) digits is 7776, while the sum is 34.

The square root of 231990208 is about 15231.2247701884. The cubic root of 231990208 is about 614.4547201516.

The spelling of 231990208 in words is "two hundred thirty-one million, nine hundred ninety thousand, two hundred eight".