531121400 has 24 divisors (see below), whose sum is σ = 1234857720. Its totient is φ = 212448480.

The previous prime is 531121387. The next prime is 531121411. The reversal of 531121400 is 4121135.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 1327604 + ... + 1328003.

It is an arithmetic number, because the mean of its divisors is an integer number (51452405).

Almost surely, 2^531121400 is an apocalyptic number.

531121400 is a gapful number since it is divisible by the number (50) formed by its first and last digit.

It is an amenable number.

531121400 is an abundant number, since it is smaller than the sum of its proper divisors (703736320).

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

531121400 is a wasteful number, since it uses less digits than its factorization.

531121400 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2655623 (or 2655614 counting only the distinct ones).

The product of its (nonzero) digits is 120, while the sum is 17.

The square root of 531121400 is about 23046.0712486966. The cubic root of 531121400 is about 809.8375938176.

Adding to 531121400 its reverse (4121135), we get a palindrome (535242535).

The spelling of 531121400 in words is "five hundred thirty-one million, one hundred twenty-one thousand, four hundred".