531231400 has 48 divisors (see below), whose sum is σ = 1411561440. Its totient is φ = 182136000.

The previous prime is 531231373. The next prime is 531231401. The reversal of 531231400 is 4132135.

It is not an unprimeable number, because it can be changed into a prime (531231401) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 188326 + ... + 191125.

It is an arithmetic number, because the mean of its divisors is an integer number (29407530).

Almost surely, 2^531231400 is an apocalyptic number.

531231400 is a gapful number since it is divisible by the number (50) formed by its first and last digit.

It is an amenable number.

531231400 is an abundant number, since it is smaller than the sum of its proper divisors (880330040).

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

531231400 is a wasteful number, since it uses less digits than its factorization.

531231400 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 379474 (or 379465 counting only the distinct ones).

The product of its (nonzero) digits is 360, while the sum is 19.

The square root of 531231400 is about 23048.4576490489. The cubic root of 531231400 is about 809.8934981652.

Adding to 531231400 its reverse (4132135), we get a palindrome (535363535).

The spelling of 531231400 in words is "five hundred thirty-one million, two hundred thirty-one thousand, four hundred".