18303225 has 12 divisors (see below), whose sum is σ = 30261456. Its totient is φ = 9761680.

The previous prime is 18303223. The next prime is 18303253. The reversal of 18303225 is 52230381.

It is not a de Polignac number, because 18303225 - 2¹ = 18303223 is a prime.

It is a super-3 number, since 3×18303225³ (a number of 23 digits) contains 333 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 18303195 and 18303204.

It is not an unprimeable number, because it can be changed into a prime (18303223) 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, 121947 + ... + 122096.

It is an arithmetic number, because the mean of its divisors is an integer number (2521788).

Almost surely, 2^18303225 is an apocalyptic number.

18303225 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

18303225 is a deficient number, since it is larger than the sum of its proper divisors (11958231).

18303225 is a wasteful number, since it uses less digits than its factorization.

18303225 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 244056 (or 244051 counting only the distinct ones).

The product of its (nonzero) digits is 1440, while the sum is 24.

The square root of 18303225 is about 4278.2268523303. The cubic root of 18303225 is about 263.5375714411.

It can be divided in two parts, 18303 and 225, that added together give a triangular number (18528 = T₁₉₂).

The spelling of 18303225 in words is "eighteen million, three hundred three thousand, two hundred twenty-five".