225404645 has 8 divisors (see below), whose sum is σ = 271112856. Its totient is φ = 179905536.

The previous prime is 225404591. The next prime is 225404687. The reversal of 225404645 is 546404522.

It can be written as a sum of positive squares in 4 ways, for example, as 1094116 + 224310529 = 1046^2 + 14977^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 225404645 - 2¹⁸ = 225142501 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 49892 + ... + 54221.

It is an arithmetic number, because the mean of its divisors is an integer number (33889107).

Almost surely, 2^225404645 is an apocalyptic number.

It is an amenable number.

225404645 is a deficient number, since it is larger than the sum of its proper divisors (45708211).

225404645 is a wasteful number, since it uses less digits than its factorization.

225404645 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 104551.

The product of its (nonzero) digits is 38400, while the sum is 32.

The square root of 225404645 is about 15013.4821077590. The cubic root of 225404645 is about 608.5845934408.

The spelling of 225404645 in words is "two hundred twenty-five million, four hundred four thousand, six hundred forty-five".