225429845 has 4 divisors (see below), whose sum is σ = 270515820. Its totient is φ = 180343872.

The previous prime is 225429823. The next prime is 225429859. The reversal of 225429845 is 548924522.

It is a happy number.

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 109286116 + 116143729 = 10454^2 + 10777^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-225429845 is a prime.

It is a congruent number.

It is an unprimeable number.

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, 22542980 + ... + 22542989.

It is an arithmetic number, because the mean of its divisors is an integer number (67628955).

Almost surely, 2^225429845 is an apocalyptic number.

It is an amenable number.

225429845 is a deficient number, since it is larger than the sum of its proper divisors (45085975).

225429845 is an equidigital number, since it uses as much as digits as its factorization.

225429845 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 45085974.

The product of its digits is 230400, while the sum is 41.

The square root of 225429845 is about 15014.3213299836. The cubic root of 225429845 is about 608.6072722995.

The spelling of 225429845 in words is "two hundred twenty-five million, four hundred twenty-nine thousand, eight hundred forty-five".