225243213 has 16 divisors (see below), whose sum is σ = 328257216. Its totient is φ = 136540800.

The previous prime is 225243199. The next prime is 225243229. The reversal of 225243213 is 312342522.

It is not a de Polignac number, because 225243213 - 2⁸ = 225242957 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (225243283) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 40488 + ... + 45713.

It is an arithmetic number, because the mean of its divisors is an integer number (20516076).

Almost surely, 2^225243213 is an apocalyptic number.

It is an amenable number.

225243213 is a deficient number, since it is larger than the sum of its proper divisors (103014003).

225243213 is a wasteful number, since it uses less digits than its factorization.

225243213 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 86284.

The product of its digits is 2880, while the sum is 24.

The square root of 225243213 is about 15008.1049103476. The cubic root of 225243213 is about 608.4392718402.

Adding to 225243213 its reverse (312342522), we get a palindrome (537585735).

It can be divided in two parts, 225243 and 213, that added together give a triangular number (225456 = T₆₇₁).

The spelling of 225243213 in words is "two hundred twenty-five million, two hundred forty-three thousand, two hundred thirteen".