222443761 has 4 divisors (see below), whose sum is σ = 222538212. Its totient is φ = 222349312.

The previous prime is 222443743. The next prime is 222443783. The reversal of 222443761 is 167344222.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 167344222 = 2 ⋅83672111.

It can be written as a sum of positive squares in 2 ways, for example, as 95746225 + 126697536 = 9785^2 + 11256^2 .

It is a cyclic number.

It is not a de Polignac number, because 222443761 - 2⁵ = 222443729 is a prime.

It is a Smith number, since the sum of its digits (31) 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 not an unprimeable number, because it can be changed into a prime (222443701) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 43600 + ... + 48433.

It is an arithmetic number, because the mean of its divisors is an integer number (55634553).

Almost surely, 2^222443761 is an apocalyptic number.

It is an amenable number.

222443761 is a deficient number, since it is larger than the sum of its proper divisors (94451).

222443761 is an equidigital number, since it uses as much as digits as its factorization.

222443761 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 94450.

The product of its digits is 16128, while the sum is 31.

The square root of 222443761 is about 14914.5486354767. The cubic root of 222443761 is about 605.9080787646.

Adding to 222443761 its reverse (167344222), we get a palindrome (389787983).

The spelling of 222443761 in words is "two hundred twenty-two million, four hundred forty-three thousand, seven hundred sixty-one".