231404223 has 8 divisors (see below), whose sum is σ = 308613808. Its totient is φ = 154232064.

The previous prime is 231404209. The next prime is 231404269. The reversal of 231404223 is 322404132.

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

It is not a de Polignac number, because 231404223 - 2⁴ = 231404207 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 231404223.

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 7 ways as a sum of consecutive naturals, for example, 12111 + ... + 24687.

It is an arithmetic number, because the mean of its divisors is an integer number (38576726).

Almost surely, 2^231404223 is an apocalyptic number.

231404223 is a deficient number, since it is larger than the sum of its proper divisors (77209585).

231404223 is a wasteful number, since it uses less digits than its factorization.

231404223 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18713.

The product of its (nonzero) digits is 1152, while the sum is 21.

The square root of 231404223 is about 15211.9763015855. The cubic root of 231404223 is about 613.9369327294.

Adding to 231404223 its reverse (322404132), we get a palindrome (553808355).

Subtracting 231404223 from its reverse (322404132), we obtain a palindrome (90999909).

The spelling of 231404223 in words is "two hundred thirty-one million, four hundred four thousand, two hundred twenty-three".