2531322540 has 144 divisors (see below), whose sum is σ = 7806419712. Its totient is φ = 663861888.

The previous prime is 2531322529. The next prime is 2531322553. The reversal of 2531322540 is 452231352.

It is a happy number.

2531322540 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 3216027 + ... + 3216813.

It is an arithmetic number, because the mean of its divisors is an integer number (54211248).

Almost surely, 2^2531322540 is an apocalyptic number.

2531322540 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 2531322540, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (3903209856).

2531322540 is an abundant number, since it is smaller than the sum of its proper divisors (5275097172).

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

2531322540 is a wasteful number, since it uses less digits than its factorization.

2531322540 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1076 (or 1071 counting only the distinct ones).

The product of its (nonzero) digits is 7200, while the sum is 27.

The square root of 2531322540 is about 50312.2503968964. The cubic root of 2531322540 is about 1362.8534631593.

Adding to 2531322540 its reverse (452231352), we get a palindrome (2983553892).

The spelling of 2531322540 in words is "two billion, five hundred thirty-one million, three hundred twenty-two thousand, five hundred forty".