40004031323 has 4 divisors (see below), whose sum is σ = 40486007688. Its totient is φ = 39522054960.

The previous prime is 40004031227. The next prime is 40004031409. The reversal of 40004031323 is 32313040004.

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

It is a cyclic number.

It is not a de Polignac number, because 40004031323 - 2¹⁰ = 40004030299 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 40004031295 and 40004031304.

It is not an unprimeable number, because it can be changed into a prime (40004031923) by changing a digit.

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, 240988058 + ... + 240988223.

It is an arithmetic number, because the mean of its divisors is an integer number (10121501922).

Almost surely, 2^40004031323 is an apocalyptic number.

40004031323 is a deficient number, since it is larger than the sum of its proper divisors (481976365).

40004031323 is an equidigital number, since it uses as much as digits as its factorization.

40004031323 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 481976364.

The product of its (nonzero) digits is 864, while the sum is 20.

Adding to 40004031323 its reverse (32313040004), we get a palindrome (72317071327).

The spelling of 40004031323 in words is "forty billion, four million, thirty-one thousand, three hundred twenty-three".