400210043 has 2 divisors, whose sum is σ = 400210044. Its totient is φ = 400210042.

The previous prime is 400210007. The next prime is 400210087. The reversal of 400210043 is 340012004.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 400210043 - 2¹² = 400205947 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (400218043) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 200105021 + 200105022.

It is an arithmetic number, because the mean of its divisors is an integer number (200105022).

Almost surely, 2^400210043 is an apocalyptic number.

400210043 is a deficient number, since it is larger than the sum of its proper divisors (1).

400210043 is an equidigital number, since it uses as much as digits as its factorization.

400210043 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 96, while the sum is 14.

The square root of 400210043 is about 20005.2503858362. The cubic root of 400210043 is about 736.9352446654.

Adding to 400210043 its reverse (340012004), we get a palindrome (740222047).

The spelling of 400210043 in words is "four hundred million, two hundred ten thousand, forty-three".