211511214 has 12 divisors (see below), whose sum is σ = 458274336. Its totient is φ = 70503732.

The previous prime is 211511191. The next prime is 211511219. The reversal of 211511214 is 412115112.

It is a Harshad number since it is a multiple of its sum of digits (18), and also a Moran number because the ratio is a prime number: 11750623 = 211511214 / (2 + 1 + 1 + 5 + 1 + 1 + 2 + 1 + 4).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (211511219) 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 5 ways as a sum of consecutive naturals, for example, 5875294 + ... + 5875329.

It is an arithmetic number, because the mean of its divisors is an integer number (38189528).

Almost surely, 2^211511214 is an apocalyptic number.

211511214 is an abundant number, since it is smaller than the sum of its proper divisors (246763122).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

211511214 is a wasteful number, since it uses less digits than its factorization.

211511214 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11750631 (or 11750628 counting only the distinct ones).

The product of its digits is 80, while the sum is 18.

The square root of 211511214 is about 14543.4251124004. The cubic root of 211511214 is about 595.8145884377.

Adding to 211511214 its reverse (412115112), we get a palindrome (623626326).

The spelling of 211511214 in words is "two hundred eleven million, five hundred eleven thousand, two hundred fourteen".