400222247 has 2 divisors, whose sum is σ = 400222248. Its totient is φ = 400222246.

The previous prime is 400222189. The next prime is 400222253. The reversal of 400222247 is 742222004.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 400222247 - 2¹⁰ = 400221223 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (400252247) 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 as a sum of consecutive naturals, namely, 200111123 + 200111124.

It is an arithmetic number, because the mean of its divisors is an integer number (200111124).

Almost surely, 2^400222247 is an apocalyptic number.

400222247 is a deficient number, since it is larger than the sum of its proper divisors (1).

400222247 is an equidigital number, since it uses as much as digits as its factorization.

400222247 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1792, while the sum is 23.

The square root of 400222247 is about 20005.5554034373. Note that the first 3 decimals coincide. The cubic root of 400222247 is about 736.9427352873.

The spelling of 400222247 in words is "four hundred million, two hundred twenty-two thousand, two hundred forty-seven".