225725639 has 2 divisors, whose sum is σ = 225725640. Its totient is φ = 225725638.

The previous prime is 225725597. The next prime is 225725761. The reversal of 225725639 is 936527522.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-225725639 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 225725596 and 225725605.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (225725939) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 112862819 + 112862820.

It is an arithmetic number, because the mean of its divisors is an integer number (112862820).

Almost surely, 2^225725639 is an apocalyptic number.

225725639 is a deficient number, since it is larger than the sum of its proper divisors (1).

225725639 is an equidigital number, since it uses as much as digits as its factorization.

225725639 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 226800, while the sum is 41.

The square root of 225725639 is about 15024.1684961265. The cubic root of 225725639 is about 608.8733472419.

The spelling of 225725639 in words is "two hundred twenty-five million, seven hundred twenty-five thousand, six hundred thirty-nine".