225684029 has 4 divisors (see below), whose sum is σ = 226396284. Its totient is φ = 224971776.

The previous prime is 225684007. The next prime is 225684037. The reversal of 225684029 is 920486522.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 4418404 + 221265625 = 2102^2 + 14875^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-225684029 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 225683983 and 225684001.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (225684059) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 355652 + ... + 356285.

It is an arithmetic number, because the mean of its divisors is an integer number (56599071).

Almost surely, 2^225684029 is an apocalyptic number.

It is an amenable number.

225684029 is a deficient number, since it is larger than the sum of its proper divisors (712255).

225684029 is an equidigital number, since it uses as much as digits as its factorization.

225684029 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 712254.

The product of its (nonzero) digits is 69120, while the sum is 38.

The square root of 225684029 is about 15022.7836634893. The cubic root of 225684029 is about 608.8359319428.

The spelling of 225684029 in words is "two hundred twenty-five million, six hundred eighty-four thousand, twenty-nine".