55171225 has 12 divisors (see below), whose sum is σ = 68743120. Its totient is φ = 43923600.

The previous prime is 55171223. The next prime is 55171241. The reversal of 55171225 is 52217155.

55171225 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 55171225 - 2¹ = 55171223 is a prime.

It is a super-3 number, since 3×55171225³ (a number of 24 digits) contains 333 as substring.

It is a hoax number, since the sum of its digits (28) coincides with the sum of the digits of its distinct prime factors.

It is a junction number, because it is equal to n+sod(n) for n = 55171193 and 55171202.

It is not an unprimeable number, because it can be changed into a prime (55171223) by changing a digit.

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 11 ways as a sum of consecutive naturals, for example, 46 + ... + 10504.

Almost surely, 2^55171225 is an apocalyptic number.

It is an amenable number.

55171225 is a deficient number, since it is larger than the sum of its proper divisors (13571895).

55171225 is a wasteful number, since it uses less digits than its factorization.

55171225 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10680 (or 10675 counting only the distinct ones).

The product of its digits is 3500, while the sum is 28.

The square root of 55171225 is about 7427.7335035662. The cubic root of 55171225 is about 380.6894800000.

The spelling of 55171225 in words is "fifty-five million, one hundred seventy-one thousand, two hundred twenty-five".