225567871 has 2 divisors, whose sum is σ = 225567872. Its totient is φ = 225567870.

The previous prime is 225567869. The next prime is 225567889. The reversal of 225567871 is 178765522.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 225567871 - 2¹ = 225567869 is a prime.

Together with 225567869, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (225567821) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 112783935 + 112783936.

It is an arithmetic number, because the mean of its divisors is an integer number (112783936).

Almost surely, 2^225567871 is an apocalyptic number.

225567871 is a deficient number, since it is larger than the sum of its proper divisors (1).

225567871 is an equidigital number, since it uses as much as digits as its factorization.

225567871 is an evil number, because the sum of its binary digits is even.

The product of its digits is 235200, while the sum is 43.

The square root of 225567871 is about 15018.9171047716. The cubic root of 225567871 is about 608.7314594772.

The spelling of 225567871 in words is "two hundred twenty-five million, five hundred sixty-seven thousand, eight hundred seventy-one".