217285064 has 16 divisors (see below), whose sum is σ = 428852400. Its totient is φ = 102924432.

The previous prime is 217285051. The next prime is 217285093. The reversal of 217285064 is 460582712.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 714602 + ... + 714905.

It is an arithmetic number, because the mean of its divisors is an integer number (26803275).

Almost surely, 2^217285064 is an apocalyptic number.

It is an amenable number.

217285064 is a deficient number, since it is larger than the sum of its proper divisors (211567336).

217285064 is a wasteful number, since it uses less digits than its factorization.

217285064 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1429532 (or 1429528 counting only the distinct ones).

The product of its (nonzero) digits is 26880, while the sum is 35.

The square root of 217285064 is about 14740.5923897244. The cubic root of 217285064 is about 601.1875221753.

The spelling of 217285064 in words is "two hundred seventeen million, two hundred eighty-five thousand, sixty-four".