43440140031 has 8 divisors (see below), whose sum is σ = 57937756800. Its totient is φ = 28951308312.

The previous prime is 43440140011. The next prime is 43440140063. The reversal of 43440140031 is 13004104434.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a de Polignac number, because none of the positive numbers 2^k-43440140031 is a prime.

It is a super-2 number, since 2×43440140031² (a number of 22 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 43440139983 and 43440140010.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (43440140011) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2184715 + ... + 2204508.

It is an arithmetic number, because the mean of its divisors is an integer number (7242219600).

Almost surely, 2^43440140031 is an apocalyptic number.

43440140031 is a deficient number, since it is larger than the sum of its proper divisors (14497616769).

43440140031 is a wasteful number, since it uses less digits than its factorization.

43440140031 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4392525.

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

Adding to 43440140031 its reverse (13004104434), we get a palindrome (56444244465).

The spelling of 43440140031 in words is "forty-three billion, four hundred forty million, one hundred forty thousand, thirty-one".