225858869 has 2 divisors, whose sum is σ = 225858870. Its totient is φ = 225858868.

The previous prime is 225858823. The next prime is 225858937. The reversal of 225858869 is 968858522.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 137780644 + 88078225 = 11738^2 + 9385^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-225858869 is a prime.

It is a super-2 number, since 2×225858869² = 102024457411918322, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 225858869.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (225851869) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 112929434 + 112929435.

It is an arithmetic number, because the mean of its divisors is an integer number (112929435).

Almost surely, 2^225858869 is an apocalyptic number.

It is an amenable number.

225858869 is a deficient number, since it is larger than the sum of its proper divisors (1).

225858869 is an equidigital number, since it uses as much as digits as its factorization.

225858869 is an evil number, because the sum of its binary digits is even.

The product of its digits is 2764800, while the sum is 53.

The square root of 225858869 is about 15028.6016980955. The cubic root of 225858869 is about 608.9931154138.

The spelling of 225858869 in words is "two hundred twenty-five million, eight hundred fifty-eight thousand, eight hundred sixty-nine".