220980685 has 8 divisors (see below), whose sum is σ = 266710680. Its totient is φ = 175761984.

The previous prime is 220980677. The next prime is 220980707. The reversal of 220980685 is 586089022.

It can be written as a sum of positive squares in 4 ways, for example, as 57805609 + 163175076 = 7603^2 + 12774^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 220980685 - 2³ = 220980677 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 126870 + ... + 128599.

It is an arithmetic number, because the mean of its divisors is an integer number (33338835).

Almost surely, 2^220980685 is an apocalyptic number.

It is an amenable number.

220980685 is a deficient number, since it is larger than the sum of its proper divisors (45729995).

220980685 is a wasteful number, since it uses less digits than its factorization.

220980685 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 255647.

The product of its (nonzero) digits is 69120, while the sum is 40.

The square root of 220980685 is about 14865.4190993729. The cubic root of 220980685 is about 604.5767456039.

It can be divided in two parts, 220980 and 685, that multiplied together give a triangular number (151371300 = T₁₇₃₉₉).

The spelling of 220980685 in words is "two hundred twenty million, nine hundred eighty thousand, six hundred eighty-five".