2131043546540 has 48 divisors (see below), whose sum is σ = 4713871680000. Its totient is φ = 807014400192.

The previous prime is 2131043546447. The next prime is 2131043546549. The reversal of 2131043546540 is 456453401312.

It is a super-2 number, since 2×2131043546540² (a number of 25 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (38).

It is a junction number, because it is equal to n+sod(n) for n = 2131043546494 and 2131043546503.

It is not an unprimeable number, because it can be changed into a prime (2131043546549) 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, 1300964 + ... + 2440203.

It is an arithmetic number, because the mean of its divisors is an integer number (98205660000).

Almost surely, 2^{2131043546540} is an apocalyptic number.

2131043546540 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

2131043546540 is an abundant number, since it is smaller than the sum of its proper divisors (2582828133460).

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

2131043546540 is a wasteful number, since it uses less digits than its factorization.

2131043546540 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3742694 (or 3742692 counting only the distinct ones).

The product of its (nonzero) digits is 172800, while the sum is 38.

Adding to 2131043546540 its reverse (456453401312), we get a palindrome (2587496947852).

The spelling of 2131043546540 in words is "two trillion, one hundred thirty-one billion, forty-three million, five hundred forty-six thousand, five hundred forty".