225040001 has 4 divisors (see below), whose sum is σ = 225618900. Its totient is φ = 224461104.

The previous prime is 225039979. The next prime is 225040007. The reversal of 225040001 is 100040522.

225040001 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 100040522 = 2 ⋅50020261.

It can be written as a sum of positive squares in 2 ways, for example, as 51854401 + 173185600 = 7201^2 + 13160^2 .

It is a cyclic number.

It is not a de Polignac number, because 225040001 - 2⁶ = 225039937 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (225040007) 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, 288866 + ... + 289643.

It is an arithmetic number, because the mean of its divisors is an integer number (56404725).

Almost surely, 2^225040001 is an apocalyptic number.

It is an amenable number.

225040001 is a deficient number, since it is larger than the sum of its proper divisors (578899).

225040001 is an equidigital number, since it uses as much as digits as its factorization.

225040001 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 578898.

The product of its (nonzero) digits is 80, while the sum is 14.

The square root of 225040001 is about 15001.3333074097. Note that the first 4 decimals coincide. The cubic root of 225040001 is about 608.2562410011.

Adding to 225040001 its reverse (100040522), we get a palindrome (325080523).

The spelling of 225040001 in words is "two hundred twenty-five million, forty thousand, one".