211404531205 has 16 divisors (see below), whose sum is σ = 289934290944. Its totient is φ = 144959068800.

The previous prime is 211404531199. The next prime is 211404531227. The reversal of 211404531205 is 502135404112.

It is not a de Polignac number, because 211404531205 - 2³⁷ = 73965577733 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1758780 + ... + 1875130.

It is an arithmetic number, because the mean of its divisors is an integer number (18120893184).

Almost surely, 2^211404531205 is an apocalyptic number.

It is an amenable number.

211404531205 is a deficient number, since it is larger than the sum of its proper divisors (78529759739).

211404531205 is a wasteful number, since it uses less digits than its factorization.

211404531205 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 168276.

The product of its (nonzero) digits is 4800, while the sum is 28.

Adding to 211404531205 its reverse (502135404112), we get a palindrome (713539935317).

The spelling of 211404531205 in words is "two hundred eleven billion, four hundred four million, five hundred thirty-one thousand, two hundred five".