55085225 has 12 divisors (see below), whose sum is σ = 73560396. Its totient is φ = 40678080.

The previous prime is 55085203. The next prime is 55085227. The reversal of 55085225 is 52258055.

It can be written as a sum of positive squares in 6 ways, for example, as 502681 + 54582544 = 709^2 + 7388^2 .

It is not a de Polignac number, because 55085225 - 2¹⁶ = 55019689 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 55085191 and 55085200.

It is not an unprimeable number, because it can be changed into a prime (55085227) 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, 84422 + ... + 85071.

It is an arithmetic number, because the mean of its divisors is an integer number (6130033).

Almost surely, 2^55085225 is an apocalyptic number.

It is an amenable number.

55085225 is a deficient number, since it is larger than the sum of its proper divisors (18475171).

55085225 is a wasteful number, since it uses less digits than its factorization.

55085225 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 169516 (or 169511 counting only the distinct ones).

The product of its (nonzero) digits is 20000, while the sum is 32.

The square root of 55085225 is about 7421.9421312753. The cubic root of 55085225 is about 380.4915729619.

The spelling of 55085225 in words is "fifty-five million, eighty-five thousand, two hundred twenty-five".