222188801 has 4 divisors (see below), whose sum is σ = 222477012. Its totient is φ = 221900592.

The previous prime is 222188777. The next prime is 222188803. The reversal of 222188801 is 108881222.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 108881222 = 2 ⋅54440611.

It can be written as a sum of positive squares in 2 ways, for example, as 108659776 + 113529025 = 10424^2 + 10655^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-222188801 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (222188803) 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, 142946 + ... + 144491.

It is an arithmetic number, because the mean of its divisors is an integer number (55619253).

Almost surely, 2^222188801 is an apocalyptic number.

It is an amenable number.

222188801 is a deficient number, since it is larger than the sum of its proper divisors (288211).

222188801 is an equidigital number, since it uses as much as digits as its factorization.

222188801 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 288210.

The product of its (nonzero) digits is 4096, while the sum is 32.

The square root of 222188801 is about 14905.9988259761. The cubic root of 222188801 is about 605.6764975594.

The spelling of 222188801 in words is "two hundred twenty-two million, one hundred eighty-eight thousand, eight hundred one".