225921953 has 2 divisors, whose sum is σ = 225921954. Its totient is φ = 225921952.

The previous prime is 225921937. The next prime is 225921973. The reversal of 225921953 is 359129522.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 125260864 + 100661089 = 11192^2 + 10033^2 .

It is a cyclic number.

It is not a de Polignac number, because 225921953 - 2⁴ = 225921937 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is not a weakly prime, because it can be changed into another prime (225921973) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 112960976 + 112960977.

It is an arithmetic number, because the mean of its divisors is an integer number (112960977).

Almost surely, 2^225921953 is an apocalyptic number.

It is an amenable number.

225921953 is a deficient number, since it is larger than the sum of its proper divisors (1).

225921953 is an equidigital number, since it uses as much as digits as its factorization.

225921953 is an evil number, because the sum of its binary digits is even.

The product of its digits is 48600, while the sum is 38.

The square root of 225921953 is about 15030.7003496178. The cubic root of 225921953 is about 609.0498088490.

The spelling of 225921953 in words is "two hundred twenty-five million, nine hundred twenty-one thousand, nine hundred fifty-three".