225521567 has 2 divisors, whose sum is σ = 225521568. Its totient is φ = 225521566.

The previous prime is 225521533. The next prime is 225521573. The reversal of 225521567 is 765125522.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 225521567 - 2⁶ = 225521503 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (225521267) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 112760783 + 112760784.

It is an arithmetic number, because the mean of its divisors is an integer number (112760784).

Almost surely, 2^225521567 is an apocalyptic number.

225521567 is a deficient number, since it is larger than the sum of its proper divisors (1).

225521567 is an equidigital number, since it uses as much as digits as its factorization.

225521567 is an evil number, because the sum of its binary digits is even.

The product of its digits is 42000, while the sum is 35.

The square root of 225521567 is about 15017.3755030631. The cubic root of 225521567 is about 608.6898036771.

The spelling of 225521567 in words is "two hundred twenty-five million, five hundred twenty-one thousand, five hundred sixty-seven".