231670443 has 4 divisors (see below), whose sum is σ = 308893928. Its totient is φ = 154446960.

The previous prime is 231670349. The next prime is 231670451. The reversal of 231670443 is 344076132.

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

It is not a de Polignac number, because 231670443 - 2¹⁰ = 231669419 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 231670443.

It is not an unprimeable number, because it can be changed into a prime (231670493) 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, 38611738 + ... + 38611743.

It is an arithmetic number, because the mean of its divisors is an integer number (77223482).

Almost surely, 2^231670443 is an apocalyptic number.

231670443 is a deficient number, since it is larger than the sum of its proper divisors (77223485).

231670443 is an equidigital number, since it uses as much as digits as its factorization.

231670443 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 77223484.

The product of its (nonzero) digits is 12096, while the sum is 30.

The square root of 231670443 is about 15220.7241286346. The cubic root of 231670443 is about 614.1722779772.

The spelling of 231670443 in words is "two hundred thirty-one million, six hundred seventy thousand, four hundred forty-three".