43561221316023 has 4 divisors (see below), whose sum is σ = 58081628421368. Its totient is φ = 29040814210680.

The previous prime is 43561221316021. The next prime is 43561221316037. The reversal of 43561221316023 is 32061312216534.

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

It is not a de Polignac number, because 43561221316023 - 2¹ = 43561221316021 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (43561221316021) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (29) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 7260203552668 + ... + 7260203552673.

It is an arithmetic number, because the mean of its divisors is an integer number (14520407105342).

Almost surely, 2^{43561221316023} is an apocalyptic number.

43561221316023 is a deficient number, since it is larger than the sum of its proper divisors (14520407105345).

43561221316023 is a wasteful number, since it uses less digits than its factorization.

43561221316023 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14520407105344.

The product of its (nonzero) digits is 155520, while the sum is 39.

The spelling of 43561221316023 in words is "forty-three trillion, five hundred sixty-one billion, two hundred twenty-one million, three hundred sixteen thousand, twenty-three".