225556439 has 2 divisors, whose sum is σ = 225556440. Its totient is φ = 225556438.

The previous prime is 225556433. The next prime is 225556451. The reversal of 225556439 is 934655522.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 225556439 - 2²⁰ = 224507863 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 225556396 and 225556405.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (225556433) 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, 112778219 + 112778220.

It is an arithmetic number, because the mean of its divisors is an integer number (112778220).

Almost surely, 2^225556439 is an apocalyptic number.

225556439 is a deficient number, since it is larger than the sum of its proper divisors (1).

225556439 is an equidigital number, since it uses as much as digits as its factorization.

225556439 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 324000, while the sum is 41.

The square root of 225556439 is about 15018.5365132559. The cubic root of 225556439 is about 608.7211756018.

The spelling of 225556439 in words is "two hundred twenty-five million, five hundred fifty-six thousand, four hundred thirty-nine".