43220040231 has 16 divisors (see below), whose sum is σ = 58695867648. Its totient is φ = 28282363200.

The previous prime is 43220040229. The next prime is 43220040239. The reversal of 43220040231 is 13204002234.

It is not a de Polignac number, because 43220040231 - 2¹ = 43220040229 is a prime.

It is a super-2 number, since 2×43220040231² (a number of 22 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 43220040198 and 43220040207.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (43220040239) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 398590 + ... + 495291.

It is an arithmetic number, because the mean of its divisors is an integer number (3668491728).

Almost surely, 2^43220040231 is an apocalyptic number.

43220040231 is a deficient number, since it is larger than the sum of its proper divisors (15475827417).

43220040231 is a wasteful number, since it uses less digits than its factorization.

43220040231 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 894182.

The product of its (nonzero) digits is 1152, while the sum is 21.

Adding to 43220040231 its reverse (13204002234), we get a palindrome (56424042465).

The spelling of 43220040231 in words is "forty-three billion, two hundred twenty million, forty thousand, two hundred thirty-one".