40023121443 has 4 divisors (see below), whose sum is σ = 53364161928. Its totient is φ = 26682080960.

The previous prime is 40023121433. The next prime is 40023121459. The reversal of 40023121443 is 34412132004.

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 40023121443 - 2⁴ = 40023121427 is a prime.

It is a super-3 number, since 3×40023121443³ (a number of 33 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is not an unprimeable number, because it can be changed into a prime (40023121433) 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, 6670520238 + ... + 6670520243.

It is an arithmetic number, because the mean of its divisors is an integer number (13341040482).

Almost surely, 2^40023121443 is an apocalyptic number.

40023121443 is a deficient number, since it is larger than the sum of its proper divisors (13341040485).

40023121443 is a wasteful number, since it uses less digits than its factorization.

40023121443 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13341040484.

The product of its (nonzero) digits is 2304, while the sum is 24.

Adding to 40023121443 its reverse (34412132004), we get a palindrome (74435253447).

The spelling of 40023121443 in words is "forty billion, twenty-three million, one hundred twenty-one thousand, four hundred forty-three".