225306187 has 2 divisors, whose sum is σ = 225306188. Its totient is φ = 225306186.

The previous prime is 225306181. The next prime is 225306223. The reversal of 225306187 is 781603522.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 225306187 - 2¹¹ = 225304139 is a prime.

It is not a weakly prime, because it can be changed into another prime (225306181) 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, 112653093 + 112653094.

It is an arithmetic number, because the mean of its divisors is an integer number (112653094).

Almost surely, 2^225306187 is an apocalyptic number.

225306187 is a deficient number, since it is larger than the sum of its proper divisors (1).

225306187 is an equidigital number, since it uses as much as digits as its factorization.

225306187 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 20160, while the sum is 34.

The square root of 225306187 is about 15010.2027634539. The cubic root of 225306187 is about 608.4959694930.

The spelling of 225306187 in words is "two hundred twenty-five million, three hundred six thousand, one hundred eighty-seven".