531243503400 has 96 divisors (see below), whose sum is σ = 1649516522400. Its totient is φ = 141435974400.

The previous prime is 531243503383. The next prime is 531243503419. The reversal of 531243503400 is 4305342135.

It is a Harshad number since it is a multiple of its sum of digits (30).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 343791 + ... + 1086590.

It is an arithmetic number, because the mean of its divisors is an integer number (17182463775).

Almost surely, 2^531243503400 is an apocalyptic number.

531243503400 is a gapful number since it is divisible by the number (50) formed by its first and last digit.

It is an amenable number.

531243503400 is an abundant number, since it is smaller than the sum of its proper divisors (1118273019000).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

531243503400 is a wasteful number, since it uses less digits than its factorization.

531243503400 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1431019 (or 1431010 counting only the distinct ones).

The product of its (nonzero) digits is 21600, while the sum is 30.

Adding to 531243503400 its reverse (4305342135), we get a palindrome (535548845535).

The spelling of 531243503400 in words is "five hundred thirty-one billion, two hundred forty-three million, five hundred three thousand, four hundred".