3551555225 has 12 divisors (see below), whose sum is σ = 4404756396. Its totient is φ = 2840710080.

The previous prime is 3551555191. The next prime is 3551555243. The reversal of 3551555225 is 5225551553.

It can be written as a sum of positive squares in 6 ways, for example, as 1141628944 + 2409926281 = 33788^2 + 49091^2 .

It is a de Polignac number, because none of the positive numbers 2^k-3551555225 is a prime.

It is a super-2 number, since 2×3551555225² = 25227089032449601250, which contains 22 as substring.

It is a Duffinian number.

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 11 ways as a sum of consecutive naturals, for example, 173639 + ... + 193011.

It is an arithmetic number, because the mean of its divisors is an integer number (367063033).

Almost surely, 2^3551555225 is an apocalyptic number.

It is an amenable number.

3551555225 is a deficient number, since it is larger than the sum of its proper divisors (853201171).

3551555225 is a wasteful number, since it uses less digits than its factorization.

3551555225 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 26716 (or 26711 counting only the distinct ones).

The product of its digits is 187500, while the sum is 38.

The square root of 3551555225 is about 59594.9261682570. The cubic root of 3551555225 is about 1525.7130375139.

The spelling of 3551555225 in words is "three billion, five hundred fifty-one million, five hundred fifty-five thousand, two hundred twenty-five".