217280852 has 6 divisors (see below), whose sum is σ = 380241498. Its totient is φ = 108640424.

The previous prime is 217280831. The next prime is 217280881. The reversal of 217280852 is 258082712.

It can be written as a sum of positive squares in only one way, i.e., 217090756 + 190096 = 14734^2 + 436^2 .

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 27160103 + ... + 27160110.

It is an arithmetic number, because the mean of its divisors is an integer number (63373583).

Almost surely, 2^217280852 is an apocalyptic number.

It is an amenable number.

217280852 is a deficient number, since it is larger than the sum of its proper divisors (162960646).

217280852 is a wasteful number, since it uses less digits than its factorization.

217280852 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 54320217 (or 54320215 counting only the distinct ones).

The product of its (nonzero) digits is 17920, while the sum is 35.

The square root of 217280852 is about 14740.4495182474. The cubic root of 217280852 is about 601.1836375422.

The spelling of 217280852 in words is "two hundred seventeen million, two hundred eighty thousand, eight hundred fifty-two".