225021143 has 2 divisors, whose sum is σ = 225021144. Its totient is φ = 225021142.

The previous prime is 225021109. The next prime is 225021149. The reversal of 225021143 is 341120522.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 225021143 - 2²⁴ = 208243927 is a prime.

It is a Sophie Germain prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (225021149) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 112510571 + 112510572.

It is an arithmetic number, because the mean of its divisors is an integer number (112510572).

Almost surely, 2^225021143 is an apocalyptic number.

225021143 is a deficient number, since it is larger than the sum of its proper divisors (1).

225021143 is an equidigital number, since it uses as much as digits as its factorization.

225021143 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 480, while the sum is 20.

The square root of 225021143 is about 15000.7047501109. The cubic root of 225021143 is about 608.2392502194.

Adding to 225021143 its reverse (341120522), we get a palindrome (566141665).

The spelling of 225021143 in words is "two hundred twenty-five million, twenty-one thousand, one hundred forty-three".