211542653 has 12 divisors (see below), whose sum is σ = 252733212. Its totient is φ = 176420160.

The previous prime is 211542647. The next prime is 211542673. The reversal of 211542653 is 356245112.

It can be written as a sum of positive squares in 2 ways, for example, as 201129124 + 10413529 = 14182^2 + 3227^2 .

It is not a de Polignac number, because 211542653 - 2⁶ = 211542589 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (211542673) 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 11 ways as a sum of consecutive naturals, for example, 56528 + ... + 60153.

It is an arithmetic number, because the mean of its divisors is an integer number (21061101).

Almost surely, 2^211542653 is an apocalyptic number.

It is an amenable number.

211542653 is a deficient number, since it is larger than the sum of its proper divisors (41190559).

211542653 is a wasteful number, since it uses less digits than its factorization.

211542653 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 116732 (or 116725 counting only the distinct ones).

The product of its digits is 7200, while the sum is 29.

The square root of 211542653 is about 14544.5059386698. The cubic root of 211542653 is about 595.8441075768.

Adding to 211542653 its reverse (356245112), we get a palindrome (567787765).

The spelling of 211542653 in words is "two hundred eleven million, five hundred forty-two thousand, six hundred fifty-three".