225320045 has 4 divisors (see below), whose sum is σ = 270384060. Its totient is φ = 180256032.

The previous prime is 225320041. The next prime is 225320071. The reversal of 225320045 is 540023522.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 540023522 = 2 ⋅270011761.

It can be written as a sum of positive squares in 2 ways, for example, as 132043081 + 93276964 = 11491^2 + 9658^2 .

It is a cyclic number.

It is not a de Polignac number, because 225320045 - 2² = 225320041 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 225320045.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (225320041) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 22532000 + ... + 22532009.

It is an arithmetic number, because the mean of its divisors is an integer number (67596015).

Almost surely, 2^225320045 is an apocalyptic number.

It is an amenable number.

225320045 is a deficient number, since it is larger than the sum of its proper divisors (45064015).

225320045 is an equidigital number, since it uses as much as digits as its factorization.

225320045 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 45064014.

The product of its (nonzero) digits is 2400, while the sum is 23.

The square root of 225320045 is about 15010.6643757030. The cubic root of 225320045 is about 608.5084449076.

Adding to 225320045 its reverse (540023522), we get a palindrome (765343567).

The spelling of 225320045 in words is "two hundred twenty-five million, three hundred twenty thousand, forty-five".