531323130400 has 36 divisors (see below), whose sum is σ = 1297092594042. Its totient is φ = 212529251840.

The previous prime is 531323130391. The next prime is 531323130421. The reversal of 531323130400 is 4031323135.

It can be written as a sum of positive squares in 3 ways, for example, as 358163947024 + 173159183376 = 598468^2 + 416124^2 .

It is a Harshad number since it is a multiple of its sum of digits (25).

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 5 ways as a sum of consecutive naturals, for example, 332076157 + ... + 332077756.

Almost surely, 2^531323130400 is an apocalyptic number.

531323130400 is a gapful number since it is divisible by the number (50) formed by its first and last digit.

It is an amenable number.

531323130400 is an abundant number, since it is smaller than the sum of its proper divisors (765769463642).

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

531323130400 is a wasteful number, since it uses less digits than its factorization.

531323130400 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 664153933 (or 664153920 counting only the distinct ones).

The product of its (nonzero) digits is 3240, while the sum is 25.

Adding to 531323130400 its reverse (4031323135), we get a palindrome (535354453535).

The spelling of 531323130400 in words is "five hundred thirty-one billion, three hundred twenty-three million, one hundred thirty thousand, four hundred".