43175642221 has 4 divisors (see below), whose sum is σ = 44664457500. Its totient is φ = 41686826944.

The previous prime is 43175642219. The next prime is 43175642231. The reversal of 43175642221 is 12224657134.

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 19107532900 + 24068109321 = 138230^2 + 155139^2 .

It is a cyclic number.

It is not a de Polignac number, because 43175642221 - 2¹ = 43175642219 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 (43175642231) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 744407596 + ... + 744407653.

It is an arithmetic number, because the mean of its divisors is an integer number (11166114375).

Almost surely, 2^43175642221 is an apocalyptic number.

It is an amenable number.

43175642221 is a deficient number, since it is larger than the sum of its proper divisors (1488815279).

43175642221 is a wasteful number, since it uses less digits than its factorization.

43175642221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1488815278.

The product of its digits is 80640, while the sum is 37.

The spelling of 43175642221 in words is "forty-three billion, one hundred seventy-five million, six hundred forty-two thousand, two hundred twenty-one".