225474646474901 has 2 divisors, whose sum is σ = 225474646474902. Its totient is φ = 225474646474900.

The previous prime is 225474646474877. The next prime is 225474646474939. The reversal of 225474646474901 is 109474646474522.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 173448215160676 + 52026431314225 = 13169974^2 + 7212935^2 .

It is a cyclic number.

It is not a de Polignac number, because 225474646474901 - 2³⁴ = 225457466605717 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (225474646474951) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 112737323237450 + 112737323237451.

It is an arithmetic number, because the mean of its divisors is an integer number (112737323237451).

Almost surely, 2^{225474646474901} is an apocalyptic number.

It is an amenable number.

225474646474901 is a deficient number, since it is larger than the sum of its proper divisors (1).

225474646474901 is an equidigital number, since it uses as much as digits as its factorization.

225474646474901 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 325140480, while the sum is 65.

The spelling of 225474646474901 in words is "two hundred twenty-five trillion, four hundred seventy-four billion, six hundred forty-six million, four hundred seventy-four thousand, nine hundred one".