211311013 has 4 divisors (see below), whose sum is σ = 215807040. Its totient is φ = 206814988.

The previous prime is 211310993. The next prime is 211311029. The reversal of 211311013 is 310113112.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-211311013 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 211310984 and 211311002.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (211317013) by changing a digit.

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 3 ways as a sum of consecutive naturals, for example, 2247943 + ... + 2248036.

It is an arithmetic number, because the mean of its divisors is an integer number (53951760).

Almost surely, 2^211311013 is an apocalyptic number.

It is an amenable number.

211311013 is a deficient number, since it is larger than the sum of its proper divisors (4496027).

211311013 is an equidigital number, since it uses as much as digits as its factorization.

211311013 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4496026.

The product of its (nonzero) digits is 18, while the sum is 13.

The square root of 211311013 is about 14536.5406132271. The cubic root of 211311013 is about 595.6265443010.

Adding to 211311013 its reverse (310113112), we get a palindrome (521424125).

The spelling of 211311013 in words is "two hundred eleven million, three hundred eleven thousand, thirteen".