531391400044 has 12 divisors (see below), whose sum is σ = 930050083368. Its totient is φ = 265662804800.

The previous prime is 531391400011. The next prime is 531391400051. The reversal of 531391400044 is 440004193135.

It is a junction number, because it is equal to n+sod(n) for n = 531391399982 and 531391400009.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 8187442 + ... + 8252089.

It is an arithmetic number, because the mean of its divisors is an integer number (77504173614).

Almost surely, 2^531391400044 is an apocalyptic number.

It is an amenable number.

531391400044 is a deficient number, since it is larger than the sum of its proper divisors (398658683324).

531391400044 is a wasteful number, since it uses less digits than its factorization.

531391400044 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16447616 (or 16447614 counting only the distinct ones).

The product of its (nonzero) digits is 25920, while the sum is 34.

Adding to 531391400044 its reverse (440004193135), we get a palindrome (971395593179).

The spelling of 531391400044 in words is "five hundred thirty-one billion, three hundred ninety-one million, four hundred thousand, forty-four".