2543355540 has 72 divisors (see below), whose sum is σ = 8416201248. Its totient is φ = 616570560.

The previous prime is 2543355527. The next prime is 2543355589. The reversal of 2543355540 is 455533452.

2543355540 is a `hidden beast` number, since 25 + 43 + 3 + 55 + 540 = 666.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a junction number, because it is equal to n+sod(n) for n = 2543355495 and 2543355504.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 640282 + ... + 644241.

It is an arithmetic number, because the mean of its divisors is an integer number (116891684).

Almost surely, 2^2543355540 is an apocalyptic number.

2543355540 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

2543355540 is an abundant number, since it is smaller than the sum of its proper divisors (5872845708).

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

2543355540 is a wasteful number, since it uses less digits than its factorization.

2543355540 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1284549 (or 1284544 counting only the distinct ones).

The product of its (nonzero) digits is 180000, while the sum is 36.

The square root of 2543355540 is about 50431.6918217107. The cubic root of 2543355540 is about 1365.0095559449.

Adding to 2543355540 its reverse (455533452), we get a palindrome (2998888992).

The spelling of 2543355540 in words is "two billion, five hundred forty-three million, three hundred fifty-five thousand, five hundred forty".