211530147 has 16 divisors (see below), whose sum is σ = 299655840. Its totient is φ = 132475392.

The previous prime is 211530139. The next prime is 211530157. The reversal of 211530147 is 741035112.

It is not a de Polignac number, because 211530147 - 2³ = 211530139 is a prime.

It is not an unprimeable number, because it can be changed into a prime (211530157) 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, 29638 + ... + 36075.

It is an arithmetic number, because the mean of its divisors is an integer number (18728490).

Almost surely, 2^211530147 is an apocalyptic number.

211530147 is a deficient number, since it is larger than the sum of its proper divisors (88125693).

211530147 is a wasteful number, since it uses less digits than its factorization.

211530147 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 65782.

The product of its (nonzero) digits is 840, while the sum is 24.

The square root of 211530147 is about 14544.0760105274. The cubic root of 211530147 is about 595.8323656213.

Adding to 211530147 its reverse (741035112), we get a palindrome (952565259).

The spelling of 211530147 in words is "two hundred eleven million, five hundred thirty thousand, one hundred forty-seven".