400000211 has 4 divisors (see below), whose sum is σ = 430769472. Its totient is φ = 369230952.

The previous prime is 400000193. The next prime is 400000261. The reversal of 400000211 is 112000004.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-400000211 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (400000261) 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 in 3 ways as a sum of consecutive naturals, for example, 15384611 + ... + 15384636.

It is an arithmetic number, because the mean of its divisors is an integer number (107692368).

Almost surely, 2^400000211 is an apocalyptic number.

400000211 is a deficient number, since it is larger than the sum of its proper divisors (30769261).

400000211 is a wasteful number, since it uses less digits than its factorization.

400000211 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 30769260.

The product of its (nonzero) digits is 8, while the sum is 8.

The square root of 400000211 is about 20000.0052749993. The cubic root of 400000211 is about 736.8064292832.

Adding to 400000211 its reverse (112000004), we get a palindrome (512000215).

The spelling of 400000211 in words is "four hundred million, two hundred eleven", and thus it is an aban number.