2821912825 has 12 divisors (see below), whose sum is σ = 3505339260. Its totient is φ = 2253551360.

The previous prime is 2821912823. The next prime is 2821912843. The reversal of 2821912825 is 5282191282.

It can be written as a sum of positive squares in 6 ways, for example, as 53890281 + 2768022544 = 7341^2 + 52612^2 .

It is not a de Polignac number, because 2821912825 - 2¹ = 2821912823 is a prime.

It is not an unprimeable number, because it can be changed into a prime (2821912823) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 84964 + ... + 113413.

It is an arithmetic number, because the mean of its divisors is an integer number (292111605).

Almost surely, 2^2821912825 is an apocalyptic number.

2821912825 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

It is an amenable number.

2821912825 is a deficient number, since it is larger than the sum of its proper divisors (683426435).

2821912825 is a wasteful number, since it uses less digits than its factorization.

2821912825 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 198956 (or 198951 counting only the distinct ones).

The product of its digits is 46080, while the sum is 40.

The square root of 2821912825 is about 53121.6794256356. The cubic root of 2821912825 is about 1413.1270111568.

The spelling of 2821912825 in words is "two billion, eight hundred twenty-one million, nine hundred twelve thousand, eight hundred twenty-five".