400404211 has 4 divisors (see below), whose sum is σ = 400491000. Its totient is φ = 400317424.

The previous prime is 400404181. The next prime is 400404227. The reversal of 400404211 is 112404004.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 400404211 - 2⁷ = 400404083 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (400404611) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 36061 + ... + 45838.

It is an arithmetic number, because the mean of its divisors is an integer number (100122750).

Almost surely, 2^400404211 is an apocalyptic number.

400404211 is a deficient number, since it is larger than the sum of its proper divisors (86789).

400404211 is an equidigital number, since it uses as much as digits as its factorization.

400404211 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 86788.

The product of its (nonzero) digits is 128, while the sum is 16.

The square root of 400404211 is about 20010.1027233745. The cubic root of 400404211 is about 737.0544038508.

Adding to 400404211 its reverse (112404004), we get a palindrome (512808215).

The spelling of 400404211 in words is "four hundred million, four hundred four thousand, two hundred eleven".