55500225 has 24 divisors (see below), whose sum is σ = 100103712. Its totient is φ = 26908800.

The previous prime is 55500217. The next prime is 55500227. The reversal of 55500225 is 52200555.

It is not a de Polignac number, because 55500225 - 2³ = 55500217 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 55500195 and 55500204.

It is not an unprimeable number, because it can be changed into a prime (55500227) 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, 32812 + ... + 34461.

It is an arithmetic number, because the mean of its divisors is an integer number (4170988).

Almost surely, 2^55500225 is an apocalyptic number.

55500225 is a gapful number since it is divisible by the number (55) formed by its first and last digit.

It is an amenable number.

55500225 is a deficient number, since it is larger than the sum of its proper divisors (44603487).

55500225 is a wasteful number, since it uses less digits than its factorization.

55500225 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 67297 (or 67292 counting only the distinct ones).

The product of its (nonzero) digits is 2500, while the sum is 24.

The square root of 55500225 is about 7449.8473138716. The cubic root of 55500225 is about 381.4446967571. Note that the first 3 decimals are identical.

The spelling of 55500225 in words is "fifty-five million, five hundred thousand, two hundred twenty-five".