55530225 has 24 divisors (see below), whose sum is σ = 102012320. Its totient is φ = 29615760.

The previous prime is 55530197. The next prime is 55530227. The reversal of 55530225 is 52203555.

It is not a de Polignac number, because 55530225 - 2⁵ = 55530193 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is not an unprimeable number, because it can be changed into a prime (55530227) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 40459 + ... + 41808.

Almost surely, 2^55530225 is an apocalyptic number.

It is an amenable number.

55530225 is a deficient number, since it is larger than the sum of its proper divisors (46482095).

55530225 is a wasteful number, since it uses less digits than its factorization.

55530225 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 82286 (or 82275 counting only the distinct ones).

The product of its (nonzero) digits is 7500, while the sum is 27.

The square root of 55530225 is about 7451.8605059408. The cubic root of 55530225 is about 381.5134128729.

It can be divided in two parts, 55530 and 225, that added together give a palindrome (55755).

The spelling of 55530225 in words is "fifty-five million, five hundred thirty thousand, two hundred twenty-five".