400031044403443 has 4 divisors (see below), whose sum is σ = 400031085283360. Its totient is φ = 400031003523528.

The previous prime is 400031044403437. The next prime is 400031044403489. The reversal of 400031044403443 is 344304440130004.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is not a de Polignac number, because 400031044403443 - 2³³ = 400022454468851 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 400031044403399 and 400031044403408.

It is not an unprimeable number, because it can be changed into a prime (400031044403743) 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, 3898438 + ... + 28552756.

It is an arithmetic number, because the mean of its divisors is an integer number (100007771320840).

Almost surely, 2^{400031044403443} is an apocalyptic number.

400031044403443 is a deficient number, since it is larger than the sum of its proper divisors (40879917).

400031044403443 is a wasteful number, since it uses less digits than its factorization.

400031044403443 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 40879916.

The product of its (nonzero) digits is 110592, while the sum is 34.

Adding to 400031044403443 its reverse (344304440130004), we get a palindrome (744335484533447).

The spelling of 400031044403443 in words is "four hundred trillion, thirty-one billion, forty-four million, four hundred three thousand, four hundred forty-three".