400234223 has 2 divisors, whose sum is σ = 400234224. Its totient is φ = 400234222.

The previous prime is 400234199. The next prime is 400234267. The reversal of 400234223 is 322432004.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 400234223 - 2¹⁶ = 400168687 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 400234195 and 400234204.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (400234283) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 200117111 + 200117112.

It is an arithmetic number, because the mean of its divisors is an integer number (200117112).

Almost surely, 2^400234223 is an apocalyptic number.

400234223 is a deficient number, since it is larger than the sum of its proper divisors (1).

400234223 is an equidigital number, since it uses as much as digits as its factorization.

400234223 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1152, while the sum is 20.

The square root of 400234223 is about 20005.8547180569. The cubic root of 400234223 is about 736.9500858183.

Adding to 400234223 its reverse (322432004), we get a palindrome (722666227).

The spelling of 400234223 in words is "four hundred million, two hundred thirty-four thousand, two hundred twenty-three".