2531403120520 has 128 divisors (see below), whose sum is σ = 5965197488640. Its totient is φ = 964971786240.

The previous prime is 2531403120517. The next prime is 2531403120541. The reversal of 2531403120520 is 250213041352.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 716500674 + ... + 716504206.

It is an arithmetic number, because the mean of its divisors is an integer number (46603105380).

Almost surely, 2^{2531403120520} is an apocalyptic number.

2531403120520 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 2531403120520, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2982598744320).

2531403120520 is an abundant number, since it is smaller than the sum of its proper divisors (3433794368120).

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

2531403120520 is a wasteful number, since it uses less digits than its factorization.

2531403120520 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6215 (or 6211 counting only the distinct ones).

The product of its (nonzero) digits is 7200, while the sum is 28.

Adding to 2531403120520 its reverse (250213041352), we get a palindrome (2781616161872).

The spelling of 2531403120520 in words is "two trillion, five hundred thirty-one billion, four hundred three million, one hundred twenty thousand, five hundred twenty".