2131500736440 has 256 divisors, whose sum is σ = 7288024464000. Its totient is φ = 553795522560.

The previous prime is 2131500736373. The next prime is 2131500736441. The reversal of 2131500736440 is 446370051312.

2131500736440 is a `hidden beast` number, since 2 + 1 + 3 + 1 + 5 + 0 + 0 + 7 + 3 + 644 + 0 = 666.

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 = 2131500736395 and 2131500736404.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2131500736441) 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, 33488166 + ... + 33551754.

Almost surely, 2^{2131500736440} is an apocalyptic number.

2131500736440 is a gapful number since it is divisible by the number (20) 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 2131500736440, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (3644012232000).

2131500736440 is an abundant number, since it is smaller than the sum of its proper divisors (5156523727560).

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

2131500736440 is a wasteful number, since it uses less digits than its factorization.

2131500736440 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 64407 (or 64397 counting only the distinct ones).

The product of its (nonzero) digits is 60480, while the sum is 36.

Adding to 2131500736440 its reverse (446370051312), we get a palindrome (2577870787752).

The spelling of 2131500736440 in words is "two trillion, one hundred thirty-one billion, five hundred million, seven hundred thirty-six thousand, four hundred forty".