225521936867 has 2 divisors, whose sum is σ = 225521936868. Its totient is φ = 225521936866.

The previous prime is 225521936789. The next prime is 225521936891. The reversal of 225521936867 is 768639125522.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 225521936867 - 2¹⁰ = 225521935843 is a prime.

It is not a weakly prime, because it can be changed into another prime (225521936897) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 112760968433 + 112760968434.

It is an arithmetic number, because the mean of its divisors is an integer number (112760968434).

Almost surely, 2^225521936867 is an apocalyptic number.

225521936867 is a deficient number, since it is larger than the sum of its proper divisors (1).

225521936867 is an equidigital number, since it uses as much as digits as its factorization.

225521936867 is an evil number, because the sum of its binary digits is even.

The product of its digits is 10886400, while the sum is 56.

The spelling of 225521936867 in words is "two hundred twenty-five billion, five hundred twenty-one million, nine hundred thirty-six thousand, eight hundred sixty-seven".