400222019 has 2 divisors, whose sum is σ = 400222020. Its totient is φ = 400222018.

The previous prime is 400222001. The next prime is 400222063. The reversal of 400222019 is 910222004.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 400222019 - 2¹⁶ = 400156483 is a prime.

It is a super-2 number, since 2×400222019² = 320355328984872722, which contains 22 as substring.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (400222079) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 200111009 + 200111010.

It is an arithmetic number, because the mean of its divisors is an integer number (200111010).

Almost surely, 2^400222019 is an apocalyptic number.

400222019 is a deficient number, since it is larger than the sum of its proper divisors (1).

400222019 is an equidigital number, since it uses as much as digits as its factorization.

400222019 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 288, while the sum is 20.

The square root of 400222019 is about 20005.5497050194. The cubic root of 400222019 is about 736.9425953459.

The spelling of 400222019 in words is "four hundred million, two hundred twenty-two thousand, nineteen".