2543523820 has 12 divisors (see below), whose sum is σ = 5341400064. Its totient is φ = 1017409520.

The previous prime is 2543523803. The next prime is 2543523821. The reversal of 2543523820 is 283253452.

It is not an unprimeable number, because it can be changed into a prime (2543523821) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 63588076 + ... + 63588115.

It is an arithmetic number, because the mean of its divisors is an integer number (445116672).

Almost surely, 2^2543523820 is an apocalyptic number.

2543523820 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

2543523820 is an abundant number, since it is smaller than the sum of its proper divisors (2797876244).

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

2543523820 is a wasteful number, since it uses less digits than its factorization.

2543523820 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 127176200 (or 127176198 counting only the distinct ones).

The product of its (nonzero) digits is 57600, while the sum is 34.

The square root of 2543523820 is about 50433.3601894619. The cubic root of 2543523820 is about 1365.0396603664.

The spelling of 2543523820 in words is "two billion, five hundred forty-three million, five hundred twenty-three thousand, eight hundred twenty".