211305039 has 16 divisors (see below), whose sum is σ = 315661440. Its totient is φ = 124601760.

The previous prime is 211305001. The next prime is 211305041. The reversal of 211305039 is 930503112.

It is a happy number.

It is not a de Polignac number, because 211305039 - 2⁷ = 211304911 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (211305089) 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, 85309 + ... + 87750.

It is an arithmetic number, because the mean of its divisors is an integer number (19728840).

Almost surely, 2^211305039 is an apocalyptic number.

211305039 is a deficient number, since it is larger than the sum of its proper divisors (104356401).

211305039 is a wasteful number, since it uses less digits than its factorization.

211305039 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 173110.

The product of its (nonzero) digits is 810, while the sum is 24.

The square root of 211305039 is about 14536.3351295985. The cubic root of 211305039 is about 595.6209312373.

The spelling of 211305039 in words is "two hundred eleven million, three hundred five thousand, thirty-nine".