531340400 has 30 divisors (see below), whose sum is σ = 1276546272. Its totient is φ = 212536000.

The previous prime is 531340399. The next prime is 531340421. The reversal of 531340400 is 4043135.

It is a Harshad number since it is a multiple of its sum of digits (20).

It is a congruent number.

It is an unprimeable number.

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 5 ways as a sum of consecutive naturals, for example, 663776 + ... + 664575.

Almost surely, 2^531340400 is an apocalyptic number.

531340400 is a gapful number since it is divisible by the number (50) formed by its first and last digit.

It is an amenable number.

531340400 is an abundant number, since it is smaller than the sum of its proper divisors (745205872).

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

531340400 is a wasteful number, since it uses less digits than its factorization.

531340400 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1328369 (or 1328358 counting only the distinct ones).

The product of its (nonzero) digits is 720, while the sum is 20.

The square root of 531340400 is about 23050.8221111526. The cubic root of 531340400 is about 809.9488866797.

Adding to 531340400 its reverse (4043135), we get a palindrome (535383535).

The spelling of 531340400 in words is "five hundred thirty-one million, three hundred forty thousand, four hundred".