531400234140 has 144 divisors (see below), whose sum is σ = 1672633138176. Its totient is φ = 136461628800.

The previous prime is 531400234139. The next prime is 531400234153. The reversal of 531400234140 is 41432004135.

It is a happy number.

531400234140 is a `hidden beast` number, since 5 + 314 + 0 + 0 + 2 + 341 + 4 + 0 = 666.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 66045 + ... + 1033035.

It is an arithmetic number, because the mean of its divisors is an integer number (11615507904).

Almost surely, 2^531400234140 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 531400234140, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (836316569088).

531400234140 is an abundant number, since it is smaller than the sum of its proper divisors (1141232904036).

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

531400234140 is a wasteful number, since it uses less digits than its factorization.

531400234140 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 967120 (or 967115 counting only the distinct ones).

The product of its (nonzero) digits is 5760, while the sum is 27.

Adding to 531400234140 its reverse (41432004135), we get a palindrome (572832238275).

The spelling of 531400234140 in words is "five hundred thirty-one billion, four hundred million, two hundred thirty-four thousand, one hundred forty".