222780685 has 4 divisors (see below), whose sum is σ = 267336828. Its totient is φ = 178224544.

The previous prime is 222780683. The next prime is 222780749. The reversal of 222780685 is 586087222.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 61058596 + 161722089 = 7814^2 + 12717^2 .

It is a cyclic number.

It is not a de Polignac number, because 222780685 - 2¹ = 222780683 is a prime.

It is a Smith number, since the sum of its digits (40) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (222780683) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 22278064 + ... + 22278073.

It is an arithmetic number, because the mean of its divisors is an integer number (66834207).

Almost surely, 2^222780685 is an apocalyptic number.

It is an amenable number.

222780685 is a deficient number, since it is larger than the sum of its proper divisors (44556143).

222780685 is an equidigital number, since it uses as much as digits as its factorization.

222780685 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 44556142.

The product of its (nonzero) digits is 107520, while the sum is 40.

The square root of 222780685 is about 14925.8395073778. The cubic root of 222780685 is about 606.2138369331.

The spelling of 222780685 in words is "two hundred twenty-two million, seven hundred eighty thousand, six hundred eighty-five".