225400243 has 4 divisors (see below), whose sum is σ = 227932920. Its totient is φ = 222867568.

The previous prime is 225400223. The next prime is 225400271. The reversal of 225400243 is 342004522.

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

It is a cyclic number.

It is not a de Polignac number, because 225400243 - 2⁹ = 225399731 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (225400213) 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, 1266205 + ... + 1266382.

It is an arithmetic number, because the mean of its divisors is an integer number (56983230).

Almost surely, 2^225400243 is an apocalyptic number.

225400243 is a deficient number, since it is larger than the sum of its proper divisors (2532677).

225400243 is an equidigital number, since it uses as much as digits as its factorization.

225400243 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2532676.

The product of its (nonzero) digits is 1920, while the sum is 22.

The square root of 225400243 is about 15013.3355054765. The cubic root of 225400243 is about 608.5806316668.

Adding to 225400243 its reverse (342004522), we get a palindrome (567404765).

The spelling of 225400243 in words is "two hundred twenty-five million, four hundred thousand, two hundred forty-three".