225245213 has 4 divisors (see below), whose sum is σ = 225331548. Its totient is φ = 225158880.

The previous prime is 225245203. The next prime is 225245219. The reversal of 225245213 is 312542522.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 312542522 = 2 ⋅156271261.

It can be written as a sum of positive squares in 2 ways, for example, as 26491609 + 198753604 = 5147^2 + 14098^2 .

It is a cyclic number.

It is not a de Polignac number, because 225245213 - 2¹⁸ = 224983069 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 (225245219) 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, 39128 + ... + 44513.

It is an arithmetic number, because the mean of its divisors is an integer number (56332887).

Almost surely, 2^225245213 is an apocalyptic number.

It is an amenable number.

225245213 is a deficient number, since it is larger than the sum of its proper divisors (86335).

225245213 is an equidigital number, since it uses as much as digits as its factorization.

225245213 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 86334.

The product of its digits is 4800, while the sum is 26.

The square root of 225245213 is about 15008.1715408640. The cubic root of 225245213 is about 608.4410726713.

Adding to 225245213 its reverse (312542522), we get a palindrome (537787735).

The spelling of 225245213 in words is "two hundred twenty-five million, two hundred forty-five thousand, two hundred thirteen".