131030215540 has 48 divisors (see below), whose sum is σ = 315146063232. Its totient is φ = 44828424576.

The previous prime is 131030215499. The next prime is 131030215541. The reversal of 131030215540 is 45512030131.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (131030215541) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 936687 + ... + 1067446.

It is an arithmetic number, because the mean of its divisors is an integer number (6565542984).

Almost surely, 2^131030215540 is an apocalyptic number.

131030215540 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

131030215540 is an abundant number, since it is smaller than the sum of its proper divisors (184115847692).

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

131030215540 is a wasteful number, since it uses less digits than its factorization.

131030215540 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2004616 (or 2004614 counting only the distinct ones).

The product of its (nonzero) digits is 1800, while the sum is 25.

Adding to 131030215540 its reverse (45512030131), we get a palindrome (176542245671).

The spelling of 131030215540 in words is "one hundred thirty-one billion, thirty million, two hundred fifteen thousand, five hundred forty".