2520521028 has 18 divisors (see below), whose sum is σ = 6371317134. Its totient is φ = 840173664.

The previous prime is 2520521027. The next prime is 2520521063. The reversal of 2520521028 is 8201250252.

It can be written as a sum of positive squares in only one way, i.e., 2253590784 + 266930244 = 47472^2 + 16338^2 .

It is a tau number, because it is divible by the number of its divisors (18).

It is a junction number, because it is equal to n+sod(n) for n = 2520520992 and 2520521010.

It is not an unprimeable number, because it can be changed into a prime (2520521021) by changing a digit.

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 5 ways as a sum of consecutive naturals, for example, 35007201 + ... + 35007272.

It is an arithmetic number, because the mean of its divisors is an integer number (353962063).

Almost surely, 2^2520521028 is an apocalyptic number.

It is an amenable number.

2520521028 is an abundant number, since it is smaller than the sum of its proper divisors (3850796106).

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

2520521028 is a wasteful number, since it uses less digits than its factorization.

2520521028 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 70014483 (or 70014478 counting only the distinct ones).

The product of its (nonzero) digits is 3200, while the sum is 27.

The square root of 2520521028 is about 50204.7908869263. The cubic root of 2520521028 is about 1360.9122030375.

The spelling of 2520521028 in words is "two billion, five hundred twenty million, five hundred twenty-one thousand, twenty-eight".