43161023550 has 96 divisors (see below), whose sum is σ = 112271956992. Its totient is φ = 10960202880.

The previous prime is 43161023509. The next prime is 43161023603. The reversal of 43161023550 is 5532016134.

It is a Harshad number since it is a multiple of its sum of digits (30).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 178119 + ... + 343581.

It is an arithmetic number, because the mean of its divisors is an integer number (1169499552).

Almost surely, 2^43161023550 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 43161023550, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (56135978496).

43161023550 is an abundant number, since it is smaller than the sum of its proper divisors (69110933442).

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

43161023550 is a wasteful number, since it uses less digits than its factorization.

43161023550 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 165562 (or 165557 counting only the distinct ones).

The product of its (nonzero) digits is 10800, while the sum is 30.

Adding to 43161023550 its reverse (5532016134), we get a palindrome (48693039684).

The spelling of 43161023550 in words is "forty-three billion, one hundred sixty-one million, twenty-three thousand, five hundred fifty".