3687220225 has 24 divisors (see below), whose sum is σ = 5093658360. Its totient is φ = 2628971520.

The previous prime is 3687220217. The next prime is 3687220261. The reversal of 3687220225 is 5220227863.

It can be written as a sum of positive squares in 12 ways, for example, as 1963641969 + 1723578256 = 44313^2 + 41516^2 .

It is not a de Polignac number, because 3687220225 - 2³ = 3687220217 is a prime.

It is an unprimeable number.

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 23 ways as a sum of consecutive naturals, for example, 186184 + ... + 205033.

It is an arithmetic number, because the mean of its divisors is an integer number (212235765).

Almost surely, 2^3687220225 is an apocalyptic number.

It is an amenable number.

3687220225 is a deficient number, since it is larger than the sum of its proper divisors (1406438135).

3687220225 is a wasteful number, since it uses less digits than its factorization.

3687220225 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 391269 (or 391264 counting only the distinct ones).

The product of its (nonzero) digits is 80640, while the sum is 37.

The square root of 3687220225 is about 60722.4853328650. The cubic root of 3687220225 is about 1544.8975784193.

The spelling of 3687220225 in words is "three billion, six hundred eighty-seven million, two hundred twenty thousand, two hundred twenty-five".