2815209225 has 36 divisors (see below), whose sum is σ = 5046129036. Its totient is φ = 1500320640.

The previous prime is 2815209217. The next prime is 2815209247. The reversal of 2815209225 is 5229025182.

2815209225 is a `hidden beast` number, since 28 + 1 + 520 + 92 + 25 = 666.

It can be written as a sum of positive squares in 6 ways, for example, as 26101881 + 2789107344 = 5109^2 + 52812^2 .

It is not a de Polignac number, because 2815209225 - 2³ = 2815209217 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 2815209225.

It is an unprimeable number.

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 35 ways as a sum of consecutive naturals, for example, 359047 + ... + 366803.

It is an arithmetic number, because the mean of its divisors is an integer number (140170251).

Almost surely, 2^2815209225 is an apocalyptic number.

2815209225 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

It is an amenable number.

2815209225 is a deficient number, since it is larger than the sum of its proper divisors (2230919811).

2815209225 is a wasteful number, since it uses less digits than its factorization.

2815209225 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9386 (or 9378 counting only the distinct ones).

The product of its (nonzero) digits is 28800, while the sum is 36.

The square root of 2815209225 is about 53058.5452589873. The cubic root of 2815209225 is about 1412.0071384598.

The spelling of 2815209225 in words is "two billion, eight hundred fifteen million, two hundred nine thousand, two hundred twenty-five".