225106645 has 4 divisors (see below), whose sum is σ = 270127980. Its totient is φ = 180085312.

The previous prime is 225106627. The next prime is 225106663. The reversal of 225106645 is 546601522.

It is a semiprime because it is the product of two primes.

It is an interprime number because it is at equal distance from previous prime (225106627) and next prime (225106663).

It can be written as a sum of positive squares in 2 ways, for example, as 61496964 + 163609681 = 7842^2 + 12791^2 .

It is a cyclic number.

It is not a de Polignac number, because 225106645 - 2⁷ = 225106517 is a prime.

It is a Smith number, since the sum of its digits (31) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 22510660 + ... + 22510669.

It is an arithmetic number, because the mean of its divisors is an integer number (67531995).

Almost surely, 2^225106645 is an apocalyptic number.

It is an amenable number.

225106645 is a deficient number, since it is larger than the sum of its proper divisors (45021335).

225106645 is an equidigital number, since it uses as much as digits as its factorization.

225106645 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 45021334.

The product of its (nonzero) digits is 14400, while the sum is 31.

The square root of 225106645 is about 15003.5544122051. The cubic root of 225106645 is about 608.3162786653.

The spelling of 225106645 in words is "two hundred twenty-five million, one hundred six thousand, six hundred forty-five".