225504187 has 2 divisors, whose sum is σ = 225504188. Its totient is φ = 225504186.

The previous prime is 225504161. The next prime is 225504193. The reversal of 225504187 is 781405522.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 225504187 - 2¹⁹ = 224979899 is a prime.

It is equal to p_12408928 and since 225504187 and 12408928 have the same sum of digits, it is a Honaker prime.

It is not a weakly prime, because it can be changed into another prime (225504107) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 112752093 + 112752094.

It is an arithmetic number, because the mean of its divisors is an integer number (112752094).

Almost surely, 2^225504187 is an apocalyptic number.

225504187 is a deficient number, since it is larger than the sum of its proper divisors (1).

225504187 is an equidigital number, since it uses as much as digits as its factorization.

225504187 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 22400, while the sum is 34.

The square root of 225504187 is about 15016.7968288846. The cubic root of 225504187 is about 608.6741668865.

The spelling of 225504187 in words is "two hundred twenty-five million, five hundred four thousand, one hundred eighty-seven".