225124145 has 4 divisors (see below), whose sum is σ = 270148980. Its totient is φ = 180099312.

The previous prime is 225124121. The next prime is 225124147. The reversal of 225124145 is 541421522.

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

It can be written as a sum of positive squares in 2 ways, for example, as 179372449 + 45751696 = 13393^2 + 6764^2 .

It is a cyclic number.

It is not a de Polignac number, because 225124145 - 2¹⁶ = 225058609 is a prime.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (225124147) 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, 22512410 + ... + 22512419.

It is an arithmetic number, because the mean of its divisors is an integer number (67537245).

Almost surely, 2^225124145 is an apocalyptic number.

It is an amenable number.

225124145 is a deficient number, since it is larger than the sum of its proper divisors (45024835).

225124145 is an equidigital number, since it uses as much as digits as its factorization.

225124145 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 45024834.

The product of its digits is 3200, while the sum is 26.

The square root of 225124145 is about 15004.1375960100. The cubic root of 225124145 is about 608.3320419480.

Adding to 225124145 its reverse (541421522), we get a palindrome (766545667).

The spelling of 225124145 in words is "two hundred twenty-five million, one hundred twenty-four thousand, one hundred forty-five".