55345225 has 12 divisors (see below), whose sum is σ = 73907596. Its totient is φ = 40870080.

The previous prime is 55345223. The next prime is 55345237. The reversal of 55345225 is 52254355.

It is a happy number.

It can be written as a sum of positive squares in 6 ways, for example, as 19501056 + 35844169 = 4416^2 + 5987^2 .

It is not a de Polignac number, because 55345225 - 2¹ = 55345223 is a prime.

It is a hoax number, since the sum of its digits (31) coincides with the sum of the digits of its distinct prime factors.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (55345223) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 84822 + ... + 85471.

Almost surely, 2^55345225 is an apocalyptic number.

It is an amenable number.

55345225 is a deficient number, since it is larger than the sum of its proper divisors (18562371).

55345225 is a wasteful number, since it uses less digits than its factorization.

55345225 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 170316 (or 170311 counting only the distinct ones).

The product of its digits is 30000, while the sum is 31.

The square root of 55345225 is about 7439.4371426876. The cubic root of 55345225 is about 381.0892684465.

The spelling of 55345225 in words is "fifty-five million, three hundred forty-five thousand, two hundred twenty-five".