222478019 has 2 divisors, whose sum is σ = 222478020. Its totient is φ = 222478018.

The previous prime is 222478007. The next prime is 222478021. The reversal of 222478019 is 910874222.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 222478019 - 2²⁰ = 221429443 is a prime.

It is a super-2 number, since 2×222478019² = 98992937876328722, which contains 22 as substring.

Together with 222478021, it forms a pair of twin primes.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 222478019.

It is not a weakly prime, because it can be changed into another prime (222408019) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 111239009 + 111239010.

It is an arithmetic number, because the mean of its divisors is an integer number (111239010).

Almost surely, 2^222478019 is an apocalyptic number.

222478019 is a deficient number, since it is larger than the sum of its proper divisors (1).

222478019 is an equidigital number, since it uses as much as digits as its factorization.

222478019 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 16128, while the sum is 35.

The square root of 222478019 is about 14915.6970671840. The cubic root of 222478019 is about 605.9391819572.

The spelling of 222478019 in words is "two hundred twenty-two million, four hundred seventy-eight thousand, nineteen".