225205143 has 4 divisors (see below), whose sum is σ = 300273528. Its totient is φ = 150136760.

The previous prime is 225205133. The next prime is 225205181. The reversal of 225205143 is 341502522.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-225205143 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (225205133) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 37534188 + ... + 37534193.

It is an arithmetic number, because the mean of its divisors is an integer number (75068382).

Almost surely, 2^225205143 is an apocalyptic number.

225205143 is a deficient number, since it is larger than the sum of its proper divisors (75068385).

225205143 is an equidigital number, since it uses as much as digits as its factorization.

225205143 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 75068384.

The product of its (nonzero) digits is 2400, while the sum is 24.

The square root of 225205143 is about 15006.8365420564. The cubic root of 225205143 is about 608.4049909876.

Adding to 225205143 its reverse (341502522), we get a palindrome (566707665).

The spelling of 225205143 in words is "two hundred twenty-five million, two hundred five thousand, one hundred forty-three".