217216054 has 24 divisors (see below), whose sum is σ = 361723824. Its totient is φ = 97746000.

The previous prime is 217216033. The next prime is 217216081. The reversal of 217216054 is 450612712.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 19999 + ... + 28885.

It is an arithmetic number, because the mean of its divisors is an integer number (15071826).

Almost surely, 2^217216054 is an apocalyptic number.

217216054 is a deficient number, since it is larger than the sum of its proper divisors (144507770).

217216054 is a wasteful number, since it uses less digits than its factorization.

217216054 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9012 (or 9001 counting only the distinct ones).

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

The square root of 217216054 is about 14738.2513888181. The cubic root of 217216054 is about 601.1238694739.

Adding to 217216054 its reverse (450612712), we get a palindrome (667828766).

The spelling of 217216054 in words is "two hundred seventeen million, two hundred sixteen thousand, fifty-four".