225651565771 has 2 divisors, whose sum is σ = 225651565772. Its totient is φ = 225651565770.

The previous prime is 225651565669. The next prime is 225651565787. The reversal of 225651565771 is 177565156522.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 225651565771 - 2³⁵ = 191291827403 is a prime.

It is not a weakly prime, because it can be changed into another prime (225651565171) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 112825782885 + 112825782886.

It is an arithmetic number, because the mean of its divisors is an integer number (112825782886).

Almost surely, 2^225651565771 is an apocalyptic number.

225651565771 is a deficient number, since it is larger than the sum of its proper divisors (1).

225651565771 is an equidigital number, since it uses as much as digits as its factorization.

225651565771 is an evil number, because the sum of its binary digits is even.

The product of its digits is 4410000, while the sum is 52.

The spelling of 225651565771 in words is "two hundred twenty-five billion, six hundred fifty-one million, five hundred sixty-five thousand, seven hundred seventy-one".