231443691 has 8 divisors (see below), whose sum is σ = 309000144. Its totient is φ = 154091520.

The previous prime is 231443689. The next prime is 231443701. The reversal of 231443691 is 196344132.

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

It is not a de Polignac number, because 231443691 - 2¹ = 231443689 is a prime.

It is not an unprimeable number, because it can be changed into a prime (231443671) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 48406 + ... + 52971.

It is an arithmetic number, because the mean of its divisors is an integer number (38625018).

Almost surely, 2^231443691 is an apocalyptic number.

231443691 is a deficient number, since it is larger than the sum of its proper divisors (77556453).

231443691 is a wasteful number, since it uses less digits than its factorization.

231443691 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 102141.

The product of its digits is 15552, while the sum is 33.

The square root of 231443691 is about 15213.2735136130. The cubic root of 231443691 is about 613.9718348372.

The spelling of 231443691 in words is "two hundred thirty-one million, four hundred forty-three thousand, six hundred ninety-one".