225187745 has 8 divisors (see below), whose sum is σ = 271598184. Its totient is φ = 179234944.

The previous prime is 225187741. The next prime is 225187747. The reversal of 225187745 is 547781522.

225187745 = T₁₂₁ + T₁₂₂ + ... + T₁₁₀₅.

225187745 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 4 ways, for example, as 62599744 + 162588001 = 7912^2 + 12751^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 225187745 - 2² = 225187741 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (225187741) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 113324 + ... + 115293.

It is an arithmetic number, because the mean of its divisors is an integer number (33949773).

Almost surely, 2^225187745 is an apocalyptic number.

It is an amenable number.

225187745 is a deficient number, since it is larger than the sum of its proper divisors (46410439).

225187745 is a wasteful number, since it uses less digits than its factorization.

225187745 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 228819.

The product of its digits is 156800, while the sum is 41.

The square root of 225187745 is about 15006.2568617227. The cubic root of 225187745 is about 608.3893233427.

The spelling of 225187745 in words is "two hundred twenty-five million, one hundred eighty-seven thousand, seven hundred forty-five".