211232305 has 8 divisors (see below), whose sum is σ = 254415744. Its totient is φ = 168361200.

The previous prime is 211232279. The next prime is 211232321. The reversal of 211232305 is 503232112.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 211232305 - 2¹⁵ = 211199537 is a prime.

It is a super-2 number, since 2×211232305² = 89238173351226050, which contains 22 as substring.

It is a Duffinian number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 76591 + ... + 79300.

It is an arithmetic number, because the mean of its divisors is an integer number (31801968).

Almost surely, 2^211232305 is an apocalyptic number.

It is an amenable number.

211232305 is a deficient number, since it is larger than the sum of its proper divisors (43183439).

211232305 is a wasteful number, since it uses less digits than its factorization.

211232305 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 156167.

The product of its (nonzero) digits is 360, while the sum is 19.

The square root of 211232305 is about 14533.8331144953. The cubic root of 211232305 is about 595.5525831837.

Adding to 211232305 its reverse (503232112), we get a palindrome (714464417).

The spelling of 211232305 in words is "two hundred eleven million, two hundred thirty-two thousand, three hundred five".