43231113405 has 48 divisors (see below), whose sum is σ = 76393128240. Its totient is φ = 22608129024.

The previous prime is 43231113403. The next prime is 43231113437. The reversal of 43231113405 is 50431113234.

It is a happy number.

43231113405 is a `hidden beast` number, since 4 + 3 + 2 + 311 + 1 + 340 + 5 = 666.

It can be written as a sum of positive squares in 8 ways, for example, as 799645284 + 42431468121 = 28278^2 + 205989^2 .

It is not a de Polignac number, because 43231113405 - 2¹ = 43231113403 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (43231113403) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 4977927 + ... + 4986603.

It is an arithmetic number, because the mean of its divisors is an integer number (1591523505).

Almost surely, 2^43231113405 is an apocalyptic number.

43231113405 is a gapful number since it is divisible by the number (45) formed by its first and last digit.

It is an amenable number.

43231113405 is a deficient number, since it is larger than the sum of its proper divisors (33162014835).

43231113405 is a wasteful number, since it uses less digits than its factorization.

43231113405 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10830 (or 10827 counting only the distinct ones).

The product of its (nonzero) digits is 4320, while the sum is 27.

Adding to 43231113405 its reverse (50431113234), we get a palindrome (93662226639).

The spelling of 43231113405 in words is "forty-three billion, two hundred thirty-one million, one hundred thirteen thousand, four hundred five".