531400355420 has 48 divisors (see below), whose sum is σ = 1219996971648. Its totient is φ = 192822672960.

The previous prime is 531400355413. The next prime is 531400355477. The reversal of 531400355420 is 24553004135.

It is a happy number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2483402 + ... + 2688881.

It is an arithmetic number, because the mean of its divisors is an integer number (25416603576).

Almost surely, 2^531400355420 is an apocalyptic number.

It is an amenable number.

531400355420 is an abundant number, since it is smaller than the sum of its proper divisors (688596616228).

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

531400355420 is a wasteful number, since it uses less digits than its factorization.

531400355420 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5172770 (or 5172768 counting only the distinct ones).

The product of its (nonzero) digits is 36000, while the sum is 32.

Adding to 531400355420 its reverse (24553004135), we get a palindrome (555953359555).

The spelling of 531400355420 in words is "five hundred thirty-one billion, four hundred million, three hundred fifty-five thousand, four hundred twenty".