231431689 has 8 divisors (see below), whose sum is σ = 235753920. Its totient is φ = 227122896.

The previous prime is 231431623. The next prime is 231431701. The reversal of 231431689 is 986134132.

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

It is a cyclic number.

It is not a de Polignac number, because 231431689 - 2⁹ = 231431177 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (231434689) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 35524 + ... + 41530.

It is an arithmetic number, because the mean of its divisors is an integer number (29469240).

Almost surely, 2^231431689 is an apocalyptic number.

It is an amenable number.

231431689 is a deficient number, since it is larger than the sum of its proper divisors (4322231).

231431689 is an equidigital number, since it uses as much as digits as its factorization.

231431689 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6719.

The product of its digits is 31104, while the sum is 37.

The square root of 231431689 is about 15212.8790503310. The cubic root of 231431689 is about 613.9612217195.

The spelling of 231431689 in words is "two hundred thirty-one million, four hundred thirty-one thousand, six hundred eighty-nine".