205147216 has 10 divisors (see below), whose sum is σ = 397472762. Its totient is φ = 102573600.

The previous prime is 205147213. The next prime is 205147249. The reversal of 205147216 is 612741502.

It can be written as a sum of positive squares in only one way, i.e., 194881600 + 10265616 = 13960^2 + 3204^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (205147213) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6410835 + ... + 6410866.

Almost surely, 2^205147216 is an apocalyptic number.

It is an amenable number.

205147216 is a deficient number, since it is larger than the sum of its proper divisors (192325546).

205147216 is a wasteful number, since it uses less digits than its factorization.

205147216 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12821709 (or 12821703 counting only the distinct ones).

The product of its (nonzero) digits is 3360, while the sum is 28.

The square root of 205147216 is about 14322.9611463552. The cubic root of 205147216 is about 589.7779649054. Note that the first 3 decimals are identical.

Adding to 205147216 its reverse (612741502), we get a palindrome (817888718).

It can be divided in two parts, 20514 and 7216, that added together give a triangular number (27730 = T₂₃₅).

The spelling of 205147216 in words is "two hundred five million, one hundred forty-seven thousand, two hundred sixteen".