231344231 has 4 divisors (see below), whose sum is σ = 232876464. Its totient is φ = 229812000.

The previous prime is 231344221. The next prime is 231344249. The reversal of 231344231 is 132443132.

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 231344231 - 2¹⁴ = 231327847 is a prime.

It is a super-2 number, since 2×231344231² = 107040306433962722, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 231344197 and 231344206.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (231344221) 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 3 ways as a sum of consecutive naturals, for example, 765890 + ... + 766191.

It is an arithmetic number, because the mean of its divisors is an integer number (58219116).

Almost surely, 2^231344231 is an apocalyptic number.

231344231 is a deficient number, since it is larger than the sum of its proper divisors (1532233).

231344231 is a wasteful number, since it uses less digits than its factorization.

231344231 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1532232.

The product of its digits is 1728, while the sum is 23.

The square root of 231344231 is about 15210.0043063768. The cubic root of 231344231 is about 613.8838733580.

Adding to 231344231 its reverse (132443132), we get a palindrome (363787363).

The spelling of 231344231 in words is "two hundred thirty-one million, three hundred forty-four thousand, two hundred thirty-one".