222276661 has 4 divisors (see below), whose sum is σ = 222340300. Its totient is φ = 222213024.

The previous prime is 222276643. The next prime is 222276673. The reversal of 222276661 is 166672222.

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 34751025 + 187525636 = 5895^2 + 13694^2 .

It is a cyclic number.

It is not a de Polignac number, because 222276661 - 2¹⁹ = 221752373 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (222276601) by changing a digit.

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 3 ways as a sum of consecutive naturals, for example, 26256 + ... + 33673.

It is an arithmetic number, because the mean of its divisors is an integer number (55585075).

Almost surely, 2^222276661 is an apocalyptic number.

It is an amenable number.

222276661 is a deficient number, since it is larger than the sum of its proper divisors (63639).

222276661 is an equidigital number, since it uses as much as digits as its factorization.

222276661 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 63638.

The product of its digits is 24192, while the sum is 34.

The square root of 222276661 is about 14908.9456703014. The cubic root of 222276661 is about 605.7563211511.

The spelling of 222276661 in words is "two hundred twenty-two million, two hundred seventy-six thousand, six hundred sixty-one".