211730151 has 16 divisors (see below), whose sum is σ = 289393280. Its totient is φ = 137622240.

The previous prime is 211730147. The next prime is 211730161. The reversal of 211730151 is 151037112.

It is a happy number.

It is not a de Polignac number, because 211730151 - 2² = 211730147 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 (211730161) 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, 94221 + ... + 96441.

It is an arithmetic number, because the mean of its divisors is an integer number (18087080).

Almost surely, 2^211730151 is an apocalyptic number.

211730151 is a deficient number, since it is larger than the sum of its proper divisors (77663129).

211730151 is a wasteful number, since it uses less digits than its factorization.

211730151 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3006.

The product of its (nonzero) digits is 210, while the sum is 21.

The square root of 211730151 is about 14550.9501751604. The cubic root of 211730151 is about 596.0200950764.

Adding to 211730151 its reverse (151037112), we get a palindrome (362767263).

The spelling of 211730151 in words is "two hundred eleven million, seven hundred thirty thousand, one hundred fifty-one".