43220444131 has 4 divisors (see below), whose sum is σ = 43928976064. Its totient is φ = 42511912200.

The previous prime is 43220444129. The next prime is 43220444209. The reversal of 43220444131 is 13144402234.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 13144402234 = 2 ⋅6572201117.

It is a cyclic number.

It is not a de Polignac number, because 43220444131 - 2¹ = 43220444129 is a prime.

It is a super-2 number, since 2×43220444131² (a number of 22 digits) contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 43220444131.

It is not an unprimeable number, because it can be changed into a prime (43220444231) 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, 354265875 + ... + 354265996.

It is an arithmetic number, because the mean of its divisors is an integer number (10982244016).

Almost surely, 2^43220444131 is an apocalyptic number.

43220444131 is a deficient number, since it is larger than the sum of its proper divisors (708531933).

43220444131 is an equidigital number, since it uses as much as digits as its factorization.

43220444131 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 708531932.

The product of its (nonzero) digits is 9216, while the sum is 28.

Adding to 43220444131 its reverse (13144402234), we get a palindrome (56364846365).

The spelling of 43220444131 in words is "forty-three billion, two hundred twenty million, four hundred forty-four thousand, one hundred thirty-one".