231188609 has 8 divisors (see below), whose sum is σ = 243216000. Its totient is φ = 219431632.

The previous prime is 231188603. The next prime is 231188611. The reversal of 231188609 is 906881132.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a de Polignac number, because none of the positive numbers 2^k-231188609 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (231188603) 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 in 7 ways as a sum of consecutive naturals, for example, 65849 + ... + 69270.

It is an arithmetic number, because the mean of its divisors is an integer number (30402000).

Almost surely, 2^231188609 is an apocalyptic number.

231188609 is a gapful number since it is divisible by the number (29) formed by its first and last digit.

It is an amenable number.

231188609 is a deficient number, since it is larger than the sum of its proper divisors (12027391).

231188609 is a wasteful number, since it uses less digits than its factorization.

231188609 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 135207.

The product of its (nonzero) digits is 20736, while the sum is 38.

The square root of 231188609 is about 15204.8876681151. The cubic root of 231188609 is about 613.7461921414.

The spelling of 231188609 in words is "two hundred thirty-one million, one hundred eighty-eight thousand, six hundred nine".