400222243 has 8 divisors (see below), whose sum is σ = 419856480. Its totient is φ = 380976960.

The previous prime is 400222189. The next prime is 400222247. The reversal of 400222243 is 342222004.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 400222243 - 2¹⁷ = 400091171 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 400222243.

It is not an unprimeable number, because it can be changed into a prime (400222247) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 95130 + ... + 99247.

It is an arithmetic number, because the mean of its divisors is an integer number (52482060).

Almost surely, 2^400222243 is an apocalyptic number.

400222243 is a deficient number, since it is larger than the sum of its proper divisors (19634237).

400222243 is a wasteful number, since it uses less digits than its factorization.

400222243 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 194477.

The product of its (nonzero) digits is 768, while the sum is 19.

The square root of 400222243 is about 20005.5553034651. Note that the first 3 decimals coincide. The cubic root of 400222243 is about 736.9427328322.

Adding to 400222243 its reverse (342222004), we get a palindrome (742444247).

The spelling of 400222243 in words is "four hundred million, two hundred twenty-two thousand, two hundred forty-three".