2543121310520 has 64 divisors (see below), whose sum is σ = 6539625443520. Its totient is φ = 871904553984.

The previous prime is 2543121310501. The next prime is 2543121310529. The reversal of 2543121310520 is 250131213452.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2543121310529) 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, 13365974 + ... + 13554906.

It is an arithmetic number, because the mean of its divisors is an integer number (102181647555).

Almost surely, 2^{2543121310520} is an apocalyptic number.

2543121310520 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

2543121310520 is an abundant number, since it is smaller than the sum of its proper divisors (3996504133000).

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

2543121310520 is a wasteful number, since it uses less digits than its factorization.

2543121310520 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 237024 (or 237020 counting only the distinct ones).

The product of its (nonzero) digits is 7200, while the sum is 29.

Adding to 2543121310520 its reverse (250131213452), we get a palindrome (2793252523972).

The spelling of 2543121310520 in words is "two trillion, five hundred forty-three billion, one hundred twenty-one million, three hundred ten thousand, five hundred twenty".