2521727540 has 12 divisors (see below), whose sum is σ = 5295627876. Its totient is φ = 1008691008.

The previous prime is 2521727539. The next prime is 2521727569. The reversal of 2521727540 is 457271252.

It can be written as a sum of positive squares in 2 ways, for example, as 1694474896 + 827252644 = 41164^2 + 28762^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 2521727540.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 63043169 + ... + 63043208.

It is an arithmetic number, because the mean of its divisors is an integer number (441302323).

Almost surely, 2^2521727540 is an apocalyptic number.

2521727540 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

2521727540 is an abundant number, since it is smaller than the sum of its proper divisors (2773900336).

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

2521727540 is a wasteful number, since it uses less digits than its factorization.

2521727540 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 126086386 (or 126086384 counting only the distinct ones).

The product of its (nonzero) digits is 39200, while the sum is 35.

The square root of 2521727540 is about 50216.8053543831. The cubic root of 2521727540 is about 1361.1293135696.

Adding to 2521727540 its reverse (457271252), we get a palindrome (2978998792).

The spelling of 2521727540 in words is "two billion, five hundred twenty-one million, seven hundred twenty-seven thousand, five hundred forty".