40431013405 has 4 divisors (see below), whose sum is σ = 48517216092. Its totient is φ = 32344810720.

The previous prime is 40431013319. The next prime is 40431013411. The reversal of 40431013405 is 50431013404.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 10148749081 + 30282264324 = 100741^2 + 174018^2 .

It is not a de Polignac number, because 40431013405 - 2⁷ = 40431013277 is a prime.

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 40431013405.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4043101336 + ... + 4043101345.

It is an arithmetic number, because the mean of its divisors is an integer number (12129304023).

Almost surely, 2^40431013405 is an apocalyptic number.

It is an amenable number.

40431013405 is a deficient number, since it is larger than the sum of its proper divisors (8086202687).

40431013405 is an equidigital number, since it uses as much as digits as its factorization.

40431013405 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8086202686.

The product of its (nonzero) digits is 2880, while the sum is 25.

Adding to 40431013405 its reverse (50431013404), we get a palindrome (90862026809).

Subtracting 40431013405 from its reverse (50431013404), we obtain a palindrome (9999999999).

The spelling of 40431013405 in words is "forty billion, four hundred thirty-one million, thirteen thousand, four hundred five".