225168973 has 2 divisors, whose sum is σ = 225168974. Its totient is φ = 225168972.

The previous prime is 225168971. The next prime is 225168991. The reversal of 225168973 is 379861522.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 174160809 + 51008164 = 13197^2 + 7142^2 .

It is a cyclic number.

It is not a de Polignac number, because 225168973 - 2¹ = 225168971 is a prime.

Together with 225168971, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (225168971) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 112584486 + 112584487.

It is an arithmetic number, because the mean of its divisors is an integer number (112584487).

Almost surely, 2^225168973 is an apocalyptic number.

It is an amenable number.

225168973 is a deficient number, since it is larger than the sum of its proper divisors (1).

225168973 is an equidigital number, since it uses as much as digits as its factorization.

225168973 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 181440, while the sum is 43.

The square root of 225168973 is about 15005.6313762534. The cubic root of 225168973 is about 608.3724174468.

The spelling of 225168973 in words is "two hundred twenty-five million, one hundred sixty-eight thousand, nine hundred seventy-three".