43150023221 has 4 divisors (see below), whose sum is σ = 43338451500. Its totient is φ = 42961594944.

The previous prime is 43150023197. The next prime is 43150023227. The reversal of 43150023221 is 12232005134.

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

It can be written as a sum of positive squares in 2 ways, for example, as 39350656900 + 3799366321 = 198370^2 + 61639^2 .

It is a cyclic number.

It is not a de Polignac number, because 43150023221 - 2¹⁰ = 43150022197 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 (43150023227) by changing a digit.

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 3 ways as a sum of consecutive naturals, for example, 94213796 + ... + 94214253.

It is an arithmetic number, because the mean of its divisors is an integer number (10834612875).

Almost surely, 2^43150023221 is an apocalyptic number.

It is an amenable number.

43150023221 is a deficient number, since it is larger than the sum of its proper divisors (188428279).

43150023221 is a wasteful number, since it uses less digits than its factorization.

43150023221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 188428278.

The product of its (nonzero) digits is 1440, while the sum is 23.

Adding to 43150023221 its reverse (12232005134), we get a palindrome (55382028355).

The spelling of 43150023221 in words is "forty-three billion, one hundred fifty million, twenty-three thousand, two hundred twenty-one".