40443113531 has 4 divisors (see below), whose sum is σ = 40444028592. Its totient is φ = 40442198472.

The previous prime is 40443113527. The next prime is 40443113533. The reversal of 40443113531 is 13531134404.

It is a happy number.

40443113531 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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 40443113531 - 2² = 40443113527 is a prime.

It is a super-2 number, since 2×40443113531² (a number of 22 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 40443113494 and 40443113503.

It is not an unprimeable number, because it can be changed into a prime (40443113533) 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, 387680 + ... + 480813.

It is an arithmetic number, because the mean of its divisors is an integer number (10111007148).

Almost surely, 2^40443113531 is an apocalyptic number.

40443113531 is a deficient number, since it is larger than the sum of its proper divisors (915061).

40443113531 is an equidigital number, since it uses as much as digits as its factorization.

40443113531 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 915060.

The product of its (nonzero) digits is 8640, while the sum is 29.

Adding to 40443113531 its reverse (13531134404), we get a palindrome (53974247935).

The spelling of 40443113531 in words is "forty billion, four hundred forty-three million, one hundred thirteen thousand, five hundred thirty-one".