43121381073 has 8 divisors (see below), whose sum is σ = 57497978688. Its totient is φ = 28746185424.

The previous prime is 43121381029. The next prime is 43121381077. The reversal of 43121381073 is 37018312134.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 43121381073 - 2²² = 43117186769 is a prime.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (43121381077) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 276490 + ... + 403347.

It is an arithmetic number, because the mean of its divisors is an integer number (7187247336).

Almost surely, 2^43121381073 is an apocalyptic number.

It is an amenable number.

43121381073 is a deficient number, since it is larger than the sum of its proper divisors (14376597615).

43121381073 is a wasteful number, since it uses less digits than its factorization.

43121381073 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 700983.

The product of its (nonzero) digits is 12096, while the sum is 33.

The spelling of 43121381073 in words is "forty-three billion, one hundred twenty-one million, three hundred eighty-one thousand, seventy-three".