2166222127 has 4 divisors (see below), whose sum is σ = 2293646976. Its totient is φ = 2038797280.

The previous prime is 2166222103. The next prime is 2166222143. The reversal of 2166222127 is 7212226612.

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

It is a cyclic number.

It is not a de Polignac number, because 2166222127 - 2¹¹ = 2166220079 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 (2166222187) 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, 63712399 + ... + 63712432.

It is an arithmetic number, because the mean of its divisors is an integer number (573411744).

Almost surely, 2^2166222127 is an apocalyptic number.

2166222127 is a deficient number, since it is larger than the sum of its proper divisors (127424849).

2166222127 is a wasteful number, since it uses less digits than its factorization.

2166222127 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 127424848.

The product of its digits is 8064, while the sum is 31.

The square root of 2166222127 is about 46542.6914455965. The cubic root of 2166222127 is about 1293.9008431959.

Adding to 2166222127 its reverse (7212226612), we get a palindrome (9378448739).

The spelling of 2166222127 in words is "two billion, one hundred sixty-six million, two hundred twenty-two thousand, one hundred twenty-seven".