231404023 has 4 divisors (see below), whose sum is σ = 233650768. Its totient is φ = 229157280.

The previous prime is 231404011. The next prime is 231404039. The reversal of 231404023 is 320404132.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 231404023 - 2¹³ = 231395831 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (231404423) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1123218 + ... + 1123423.

It is an arithmetic number, because the mean of its divisors is an integer number (58412692).

Almost surely, 2^231404023 is an apocalyptic number.

231404023 is a deficient number, since it is larger than the sum of its proper divisors (2246745).

231404023 is a wasteful number, since it uses less digits than its factorization.

231404023 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2246744.

The product of its (nonzero) digits is 576, while the sum is 19.

The square root of 231404023 is about 15211.9697278163. The cubic root of 231404023 is about 613.9367558565.

Adding to 231404023 its reverse (320404132), we get a palindrome (551808155).

The spelling of 231404023 in words is "two hundred thirty-one million, four hundred four thousand, twenty-three".