43431423 has 32 divisors (see below), whose sum is σ = 68823552. Its totient is φ = 23846400.

The previous prime is 43431389. The next prime is 43431449. The reversal of 43431423 is 32413434.

It is not a de Polignac number, because 43431423 - 2¹³ = 43423231 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 43431393 and 43431402.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (43431023) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 62508 + ... + 63198.

It is an arithmetic number, because the mean of its divisors is an integer number (2150736).

Almost surely, 2^43431423 is an apocalyptic number.

43431423 is a deficient number, since it is larger than the sum of its proper divisors (25392129).

43431423 is a wasteful number, since it uses less digits than its factorization.

43431423 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 815.

The product of its digits is 3456, while the sum is 24.

The square root of 43431423 is about 6590.2521196082. The cubic root of 43431423 is about 351.5075732184.

Adding to 43431423 its reverse (32413434), we get a palindrome (75844857).

The spelling of 43431423 in words is "forty-three million, four hundred thirty-one thousand, four hundred twenty-three".