531355144140 has 36 divisors (see below), whose sum is σ = 1611777271104. Its totient is φ = 141694705056.

The previous prime is 531355144129. The next prime is 531355144163. The reversal of 531355144140 is 41441553135.

531355144140 is a `hidden beast` number, since 5 + 3 + 135 + 514 + 4 + 1 + 4 + 0 = 666.

It is a tau number, because it is divible by the number of its divisors (36).

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a junction number, because it is equal to n+sod(n) for n = 531355144095 and 531355144104.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1475986332 + ... + 1475986691.

It is an arithmetic number, because the mean of its divisors is an integer number (44771590864).

Almost surely, 2^531355144140 is an apocalyptic number.

It is an amenable number.

531355144140 is an abundant number, since it is smaller than the sum of its proper divisors (1080422126964).

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

531355144140 is a wasteful number, since it uses less digits than its factorization.

531355144140 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2951973038 (or 2951973033 counting only the distinct ones).

The product of its (nonzero) digits is 72000, while the sum is 36.

Adding to 531355144140 its reverse (41441553135), we get a palindrome (572796697275).

The spelling of 531355144140 in words is "five hundred thirty-one billion, three hundred fifty-five million, one hundred forty-four thousand, one hundred forty".