225233213 has 4 divisors (see below), whose sum is σ = 230726748. Its totient is φ = 219739680.

The previous prime is 225233081. The next prime is 225233231. The reversal of 225233213 is 312332522.

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 131492089 + 93741124 = 11467^2 + 9682^2 .

It is a cyclic number.

It is not a de Polignac number, because 225233213 - 2⁸ = 225232957 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (225233233) 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, 2746706 + ... + 2746787.

It is an arithmetic number, because the mean of its divisors is an integer number (57681687).

Almost surely, 2^225233213 is an apocalyptic number.

It is an amenable number.

225233213 is a deficient number, since it is larger than the sum of its proper divisors (5493535).

225233213 is an equidigital number, since it uses as much as digits as its factorization.

225233213 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5493534.

The product of its digits is 2160, while the sum is 23.

The square root of 225233213 is about 15007.7717533283. The cubic root of 225233213 is about 608.4302675249.

Adding to 225233213 its reverse (312332522), we get a palindrome (537565735).

The spelling of 225233213 in words is "two hundred twenty-five million, two hundred thirty-three thousand, two hundred thirteen".