1531330135140 has 192 divisors, whose sum is σ = 4656392697600. Its totient is φ = 376007943168.

The previous prime is 1531330135133. The next prime is 1531330135141. The reversal of 1531330135140 is 415310331351.

It is a Harshad number since it is a multiple of its sum of digits (30).

It is a junction number, because it is equal to n+sod(n) for n = 1531330135098 and 1531330135107.

It is not an unprimeable number, because it can be changed into a prime (1531330135141) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 53900179 + ... + 53928581.

It is an arithmetic number, because the mean of its divisors is an integer number (24252045300).

Almost surely, 2^{1531330135140} is an apocalyptic number.

1531330135140 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1531330135140, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2328196348800).

1531330135140 is an abundant number, since it is smaller than the sum of its proper divisors (3125062562460).

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

1531330135140 is a wasteful number, since it uses less digits than its factorization.

1531330135140 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 28863 (or 28835 counting only the distinct ones).

The product of its (nonzero) digits is 8100, while the sum is 30.

Adding to 1531330135140 its reverse (415310331351), we get a palindrome (1946640466491).

The spelling of 1531330135140 in words is "one trillion, five hundred thirty-one billion, three hundred thirty million, one hundred thirty-five thousand, one hundred forty".