216220708 has 36 divisors (see below), whose sum is σ = 423809820. Its totient is φ = 96416320.

The previous prime is 216220601. The next prime is 216220717. The reversal of 216220708 is 807022612.

It can be written as a sum of positive squares in 2 ways, for example, as 93276964 + 122943744 = 9658^2 + 11088^2 .

It is a congruent number.

It is an unprimeable number.

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 in 11 ways as a sum of consecutive naturals, for example, 21438 + ... + 29866.

It is an arithmetic number, because the mean of its divisors is an integer number (11772495).

Almost surely, 2^216220708 is an apocalyptic number.

It is an amenable number.

216220708 is a deficient number, since it is larger than the sum of its proper divisors (207589112).

216220708 is a wasteful number, since it uses less digits than its factorization.

216220708 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8508 (or 8495 counting only the distinct ones).

The product of its (nonzero) digits is 2688, while the sum is 28.

The square root of 216220708 is about 14704.4451782446. The cubic root of 216220708 is about 600.2042896942.

The spelling of 216220708 in words is "two hundred sixteen million, two hundred twenty thousand, seven hundred eight".