211513211 has 16 divisors (see below), whose sum is σ = 269304000. Its totient is φ = 161578368.

The previous prime is 211513177. The next prime is 211513223. The reversal of 211513211 is 112315112.

It is not a de Polignac number, because 211513211 - 2¹⁰ = 211512187 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 211513211.

It is not an unprimeable number, because it can be changed into a prime (211513231) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 37436 + ... + 42713.

It is an arithmetic number, because the mean of its divisors is an integer number (16831500).

Almost surely, 2^211513211 is an apocalyptic number.

211513211 is a deficient number, since it is larger than the sum of its proper divisors (57790789).

211513211 is a wasteful number, since it uses less digits than its factorization.

211513211 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 80198.

The product of its digits is 60, while the sum is 17.

The square root of 211513211 is about 14543.4937686926. The cubic root of 211513211 is about 595.8164635755.

Adding to 211513211 its reverse (112315112), we get a palindrome (323828323).

The spelling of 211513211 in words is "two hundred eleven million, five hundred thirteen thousand, two hundred eleven".