4231321641605 has 4 divisors (see below), whose sum is σ = 5077585969932. Its totient is φ = 3385057313280.

The previous prime is 4231321641587. The next prime is 4231321641641. The reversal of 4231321641605 is 5061461231324.

4231321641605 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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

It can be written as a sum of positive squares in 2 ways, for example, as 2855988461089 + 1375333180516 = 1689967^2 + 1172746^2 .

It is a de Polignac number, because none of the positive numbers 2^k-4231321641605 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 423132164156 + ... + 423132164165.

It is an arithmetic number, because the mean of its divisors is an integer number (1269396492483).

Almost surely, 2^{4231321641605} is an apocalyptic number.

It is an amenable number.

4231321641605 is a deficient number, since it is larger than the sum of its proper divisors (846264328327).

4231321641605 is an equidigital number, since it uses as much as digits as its factorization.

4231321641605 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 846264328326.

The product of its (nonzero) digits is 103680, while the sum is 38.

Adding to 4231321641605 its reverse (5061461231324), we get a palindrome (9292782872929).

The spelling of 4231321641605 in words is "four trillion, two hundred thirty-one billion, three hundred twenty-one million, six hundred forty-one thousand, six hundred five".