231434443 has 4 divisors (see below), whose sum is σ = 234034920. Its totient is φ = 228833968.

The previous prime is 231434429. The next prime is 231434453. The reversal of 231434443 is 344434132.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-231434443 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (231434453) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1300105 + ... + 1300282.

It is an arithmetic number, because the mean of its divisors is an integer number (58508730).

Almost surely, 2^231434443 is an apocalyptic number.

231434443 is a deficient number, since it is larger than the sum of its proper divisors (2600477).

231434443 is an equidigital number, since it uses as much as digits as its factorization.

231434443 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2600476.

The product of its digits is 13824, while the sum is 28.

The square root of 231434443 is about 15212.9695654727. The cubic root of 231434443 is about 613.9636570566.

Adding to 231434443 its reverse (344434132), we get a palindrome (575868575).

The spelling of 231434443 in words is "two hundred thirty-one million, four hundred thirty-four thousand, four hundred forty-three".