43243220423 has 16 divisors (see below), whose sum is σ = 47422771200. Its totient is φ = 39191199840.

The previous prime is 43243220387. The next prime is 43243220431. The reversal of 43243220423 is 32402234234.

It is a happy number.

It is not a de Polignac number, because 43243220423 - 2¹⁰ = 43243219399 is a prime.

It is a super-2 number, since 2×43243220423² (a number of 22 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (43243220323) 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, 66218 + ... + 301448.

It is an arithmetic number, because the mean of its divisors is an integer number (2963923200).

Almost surely, 2^43243220423 is an apocalyptic number.

43243220423 is a deficient number, since it is larger than the sum of its proper divisors (4179550777).

43243220423 is a wasteful number, since it uses less digits than its factorization.

43243220423 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 235502.

The product of its (nonzero) digits is 27648, while the sum is 29.

Adding to 43243220423 its reverse (32402234234), we get a palindrome (75645454657).

The spelling of 43243220423 in words is "forty-three billion, two hundred forty-three million, two hundred twenty thousand, four hundred twenty-three".