2530821380 has 24 divisors (see below), whose sum is σ = 5315670360. Its totient is φ = 1012148480.

The previous prime is 2530821347. The next prime is 2530821383. The reversal of 2530821380 is 831280352.

It can be written as a sum of positive squares in 4 ways, for example, as 139806976 + 2391014404 = 11824^2 + 48898^2 .

It is not an unprimeable number, because it can be changed into a prime (2530821383) 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 7 ways as a sum of consecutive naturals, for example, 211970 + ... + 223590.

It is an arithmetic number, because the mean of its divisors is an integer number (221486265).

Almost surely, 2^2530821380 is an apocalyptic number.

2530821380 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

2530821380 is an abundant number, since it is smaller than the sum of its proper divisors (2784848980).

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

2530821380 is a wasteful number, since it uses less digits than its factorization.

2530821380 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 22519 (or 22517 counting only the distinct ones).

The product of its (nonzero) digits is 11520, while the sum is 32.

The square root of 2530821380 is about 50307.2696535998. The cubic root of 2530821380 is about 1362.7635164074.

The spelling of 2530821380 in words is "two billion, five hundred thirty million, eight hundred twenty-one thousand, three hundred eighty".