211712061 has 16 divisors (see below), whose sum is σ = 309841920. Its totient is φ = 127519920.

The previous prime is 211712057. The next prime is 211712063. The reversal of 211712061 is 160217112.

It is a happy number.

It is not a de Polignac number, because 211712061 - 2² = 211712057 is a prime.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (211712063) 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, 14301 + ... + 25058.

It is an arithmetic number, because the mean of its divisors is an integer number (19365120).

Almost surely, 2^211712061 is an apocalyptic number.

It is an amenable number.

211712061 is a deficient number, since it is larger than the sum of its proper divisors (98129859).

211712061 is a wasteful number, since it uses less digits than its factorization.

211712061 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 39536.

The product of its (nonzero) digits is 168, while the sum is 21.

The square root of 211712061 is about 14550.3285529915. The cubic root of 211712061 is about 596.0031201509.

Adding to 211712061 its reverse (160217112), we get a palindrome (371929173).

It can be divided in two parts, 21171 and 2061, that added together give a palindrome (23232).

The spelling of 211712061 in words is "two hundred eleven million, seven hundred twelve thousand, sixty-one".