40431432423 has 4 divisors (see below), whose sum is σ = 53908576568. Its totient is φ = 26954288280.

The previous prime is 40431432409. The next prime is 40431432463. The reversal of 40431432423 is 32423413404.

It is a happy number.

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

It is not a de Polignac number, because 40431432423 - 2²⁵ = 40397877991 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (40431432463) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 6738572068 + ... + 6738572073.

It is an arithmetic number, because the mean of its divisors is an integer number (13477144142).

Almost surely, 2^40431432423 is an apocalyptic number.

40431432423 is a deficient number, since it is larger than the sum of its proper divisors (13477144145).

40431432423 is a wasteful number, since it uses less digits than its factorization.

40431432423 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13477144144.

The product of its (nonzero) digits is 27648, while the sum is 30.

Adding to 40431432423 its reverse (32423413404), we get a palindrome (72854845827).

The spelling of 40431432423 in words is "forty billion, four hundred thirty-one million, four hundred thirty-two thousand, four hundred twenty-three".