43451302232123 has 4 divisors (see below), whose sum is σ = 44187764981880. Its totient is φ = 42714839482368.

The previous prime is 43451302232111. The next prime is 43451302232171. The reversal of 43451302232123 is 32123220315434.

43451302232123 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 is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-43451302232123 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (43451302232423) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 368231374790 + ... + 368231374907.

It is an arithmetic number, because the mean of its divisors is an integer number (11046941245470).

Almost surely, 2^{43451302232123} is an apocalyptic number.

43451302232123 is a deficient number, since it is larger than the sum of its proper divisors (736462749757).

43451302232123 is an equidigital number, since it uses as much as digits as its factorization.

43451302232123 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 736462749756.

The product of its (nonzero) digits is 103680, while the sum is 35.

Adding to 43451302232123 its reverse (32123220315434), we get a palindrome (75574522547557).

The spelling of 43451302232123 in words is "forty-three trillion, four hundred fifty-one billion, three hundred two million, two hundred thirty-two thousand, one hundred twenty-three".