211511053 has 4 divisors (see below), whose sum is σ = 227781148. Its totient is φ = 195240960.

The previous prime is 211511033. The next prime is 211511057. The reversal of 211511053 is 350115112.

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

It can be written as a sum of positive squares in 2 ways, for example, as 35497764 + 176013289 = 5958^2 + 13267^2 .

It is a cyclic number.

It is not a de Polignac number, because 211511053 - 2¹⁷ = 211379981 is a prime.

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 211511053.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (211511057) 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, 8135028 + ... + 8135053.

It is an arithmetic number, because the mean of its divisors is an integer number (56945287).

Almost surely, 2^211511053 is an apocalyptic number.

It is an amenable number.

211511053 is a deficient number, since it is larger than the sum of its proper divisors (16270095).

211511053 is a wasteful number, since it uses less digits than its factorization.

211511053 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16270094.

The product of its (nonzero) digits is 150, while the sum is 19.

The square root of 211511053 is about 14543.4195772521. The cubic root of 211511053 is about 595.8144372619.

Adding to 211511053 its reverse (350115112), we get a palindrome (561626165).

The spelling of 211511053 in words is "two hundred eleven million, five hundred eleven thousand, fifty-three".