43121550553550 has 36 divisors (see below), whose sum is σ = 93300954896880. Its totient is φ = 14784531617520.

The previous prime is 43121550553481. The next prime is 43121550553559. The reversal of 43121550553550 is 5535505512134.

It is a happy number.

43121550553550 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a super-2 number, since 2×43121550553550² (a number of 28 digits) contains 22 as substring.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (43121550553559) 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 17 ways as a sum of consecutive naturals, for example, 8800313990 + ... + 8800318889.

It is an arithmetic number, because the mean of its divisors is an integer number (2591693191580).

Almost surely, 2^{43121550553550} is an apocalyptic number.

43121550553550 is an abundant number, since it is smaller than the sum of its proper divisors (50179404343330).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

43121550553550 is a wasteful number, since it uses less digits than its factorization.

43121550553550 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17600632905 (or 17600632893 counting only the distinct ones).

The product of its (nonzero) digits is 1125000, while the sum is 44.

The spelling of 43121550553550 in words is "forty-three trillion, one hundred twenty-one billion, five hundred fifty million, five hundred fifty-three thousand, five hundred fifty".