2752520821 has 8 divisors (see below), whose sum is σ = 2765763000. Its totient is φ = 2739311040.

The previous prime is 2752520789. The next prime is 2752520879. The reversal of 2752520821 is 1280252572.

It can be written as a sum of positive squares in 4 ways, for example, as 16080100 + 2736440721 = 4010^2 + 52311^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 2752520821 - 2⁵ = 2752520789 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2752820821) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 171655 + ... + 187003.

It is an arithmetic number, because the mean of its divisors is an integer number (345720375).

Almost surely, 2^2752520821 is an apocalyptic number.

It is an amenable number.

2752520821 is a deficient number, since it is larger than the sum of its proper divisors (13242179).

2752520821 is a wasteful number, since it uses less digits than its factorization.

2752520821 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16199.

The product of its (nonzero) digits is 22400, while the sum is 34.

The square root of 2752520821 is about 52464.4719881941. The cubic root of 2752520821 is about 1401.4476218382.

The spelling of 2752520821 in words is "two billion, seven hundred fifty-two million, five hundred twenty thousand, eight hundred twenty-one".