211730345 has 8 divisors (see below), whose sum is σ = 254177664. Its totient is φ = 169316784.

The previous prime is 211730333. The next prime is 211730353. The reversal of 211730345 is 543037112.

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

It is a cyclic number.

It is not a de Polignac number, because 211730345 - 2¹⁰ = 211729321 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 8432 + ... + 22238.

It is an arithmetic number, because the mean of its divisors is an integer number (31772208).

Almost surely, 2^211730345 is an apocalyptic number.

It is an amenable number.

211730345 is a deficient number, since it is larger than the sum of its proper divisors (42447319).

211730345 is a wasteful number, since it uses less digits than its factorization.

211730345 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16879.

The product of its (nonzero) digits is 2520, while the sum is 26.

The square root of 211730345 is about 14550.9568413902. The cubic root of 211730345 is about 596.0202771129.

Adding to 211730345 its reverse (543037112), we get a palindrome (754767457).

The spelling of 211730345 in words is "two hundred eleven million, seven hundred thirty thousand, three hundred forty-five".