43130221550 has 48 divisors (see below), whose sum is σ = 87682690032. Its totient is φ = 15687302400.

The previous prime is 43130221499. The next prime is 43130221571. The reversal of 43130221550 is 5512203134.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (26).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 451631 + ... + 538730.

It is an arithmetic number, because the mean of its divisors is an integer number (1826722709).

Almost surely, 2^43130221550 is an apocalyptic number.

43130221550 is an abundant number, since it is smaller than the sum of its proper divisors (44552468482).

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

43130221550 is a wasteful number, since it uses less digits than its factorization.

43130221550 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 990453 (or 990448 counting only the distinct ones).

The product of its (nonzero) digits is 3600, while the sum is 26.

Adding to 43130221550 its reverse (5512203134), we get a palindrome (48642424684).

The spelling of 43130221550 in words is "forty-three billion, one hundred thirty million, two hundred twenty-one thousand, five hundred fifty".