40204432243 has 4 divisors (see below), whose sum is σ = 40238476128. Its totient is φ = 40170388360.

The previous prime is 40204432241. The next prime is 40204432267. The reversal of 40204432243 is 34223440204.

It is a happy number.

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 40204432243 - 2¹ = 40204432241 is a prime.

It is a super-2 number, since 2×40204432243² (a number of 22 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (40204432241) 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, 17020171 + ... + 17022532.

It is an arithmetic number, because the mean of its divisors is an integer number (10059619032).

Almost surely, 2^40204432243 is an apocalyptic number.

40204432243 is a deficient number, since it is larger than the sum of its proper divisors (34043885).

40204432243 is a wasteful number, since it uses less digits than its factorization.

40204432243 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 34043884.

The product of its (nonzero) digits is 18432, while the sum is 28.

Adding to 40204432243 its reverse (34223440204), we get a palindrome (74427872447).

The spelling of 40204432243 in words is "forty billion, two hundred four million, four hundred thirty-two thousand, two hundred forty-three".