205225406 has 8 divisors (see below), whose sum is σ = 314388000. Its totient is φ = 100429408.

The previous prime is 205225387. The next prime is 205225439. The reversal of 205225406 is 604522502.

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

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1091531 + ... + 1091718.

It is an arithmetic number, because the mean of its divisors is an integer number (39298500).

Almost surely, 2^205225406 is an apocalyptic number.

205225406 is a deficient number, since it is larger than the sum of its proper divisors (109162594).

205225406 is a wasteful number, since it uses less digits than its factorization.

205225406 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2183298.

The product of its (nonzero) digits is 4800, while the sum is 26.

The square root of 205225406 is about 14325.6904196622. The cubic root of 205225406 is about 589.8528848945.

Adding to 205225406 its reverse (604522502), we get a palindrome (809747908).

The spelling of 205225406 in words is "two hundred five million, two hundred twenty-five thousand, four hundred six".