40005323243 has 4 divisors (see below), whose sum is σ = 40030034760. Its totient is φ = 39980611728.

The previous prime is 40005323233. The next prime is 40005323273. The reversal of 40005323243 is 34232350004.

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 40005323243 - 2¹⁶ = 40005257707 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (40005323233) 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, 12353330 + ... + 12356567.

It is an arithmetic number, because the mean of its divisors is an integer number (10007508690).

Almost surely, 2^40005323243 is an apocalyptic number.

40005323243 is a deficient number, since it is larger than the sum of its proper divisors (24711517).

40005323243 is a wasteful number, since it uses less digits than its factorization.

40005323243 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 24711516.

The product of its (nonzero) digits is 8640, while the sum is 26.

Adding to 40005323243 its reverse (34232350004), we get a palindrome (74237673247).

The spelling of 40005323243 in words is "forty billion, five million, three hundred twenty-three thousand, two hundred forty-three".