211404401 has 16 divisors (see below), whose sum is σ = 241718400. Its totient is φ = 183161088.

The previous prime is 211404377. The next prime is 211404409. The reversal of 211404401 is 104404112.

211404401 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a cyclic number.

It is not a de Polignac number, because 211404401 - 2¹⁸ = 211142257 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (17).

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 211404401.

It is not an unprimeable number, because it can be changed into a prime (211404409) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 95930 + ... + 98108.

It is an arithmetic number, because the mean of its divisors is an integer number (15107400).

Almost surely, 2^211404401 is an apocalyptic number.

It is an amenable number.

211404401 is a deficient number, since it is larger than the sum of its proper divisors (30313999).

211404401 is a wasteful number, since it uses less digits than its factorization.

211404401 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2648.

The product of its (nonzero) digits is 128, while the sum is 17.

The square root of 211404401 is about 14539.7524394331. The cubic root of 211404401 is about 595.7142762474.

Adding to 211404401 its reverse (104404112), we get a palindrome (315808513).

The spelling of 211404401 in words is "two hundred eleven million, four hundred four thousand, four hundred one".