225138271 has 4 divisors (see below), whose sum is σ = 225171712. Its totient is φ = 225104832.

The previous prime is 225138253. The next prime is 225138299. The reversal of 225138271 is 172831522.

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 225138271 - 2¹³ = 225130079 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (225138241) 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, 2706 + ... + 21391.

It is an arithmetic number, because the mean of its divisors is an integer number (56292928).

Almost surely, 2^225138271 is an apocalyptic number.

225138271 is a deficient number, since it is larger than the sum of its proper divisors (33441).

225138271 is an equidigital number, since it uses as much as digits as its factorization.

225138271 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 33440.

The product of its digits is 6720, while the sum is 31.

The square root of 225138271 is about 15004.6083254446. The cubic root of 225138271 is about 608.3447654739.

Adding to 225138271 its reverse (172831522), we get a palindrome (397969793).

The spelling of 225138271 in words is "two hundred twenty-five million, one hundred thirty-eight thousand, two hundred seventy-one".