225687852086869 has 2 divisors, whose sum is σ = 225687852086870. Its totient is φ = 225687852086868.

The previous prime is 225687852086803. The next prime is 225687852086951. The reversal of 225687852086869 is 968680258786522.

It is a happy number.

It is an a-pointer prime, because the next prime (225687852086951) can be obtained adding 225687852086869 to its sum of digits (82).

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 177567964164369 + 48119887922500 = 13325463^2 + 6936850^2 .

It is a cyclic number.

It is not a de Polignac number, because 225687852086869 - 2⁹ = 225687852086357 is a prime.

It is a super-2 number, since 2×225687852086869² (a number of 30 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 225687852086792 and 225687852086801.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (225687852086269) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 112843926043434 + 112843926043435.

It is an arithmetic number, because the mean of its divisors is an integer number (112843926043435).

Almost surely, 2^{225687852086869} is an apocalyptic number.

It is an amenable number.

225687852086869 is a deficient number, since it is larger than the sum of its proper divisors (1).

225687852086869 is an equidigital number, since it uses as much as digits as its factorization.

225687852086869 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 11147673600, while the sum is 82.

The spelling of 225687852086869 in words is "two hundred twenty-five trillion, six hundred eighty-seven billion, eight hundred fifty-two million, eighty-six thousand, eight hundred sixty-nine".