211312313 has 4 divisors (see below), whose sum is σ = 211368528. Its totient is φ = 211256100.

The previous prime is 211312303. The next prime is 211312327. The reversal of 211312313 is 313213112.

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 not a de Polignac number, because 211312313 - 2⁶ = 211312249 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 211312291 and 211312300.

It is not an unprimeable number, because it can be changed into a prime (211312303) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 22031 + ... + 30132.

It is an arithmetic number, because the mean of its divisors is an integer number (52842132).

Almost surely, 2^211312313 is an apocalyptic number.

It is an amenable number.

211312313 is a deficient number, since it is larger than the sum of its proper divisors (56215).

211312313 is an equidigital number, since it uses as much as digits as its factorization.

211312313 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 56214.

The product of its digits is 108, while the sum is 17.

The square root of 211312313 is about 14536.5853280611. The cubic root of 211312313 is about 595.6277657437.

Adding to 211312313 its reverse (313213112), we get a palindrome (524525425).

The spelling of 211312313 in words is "two hundred eleven million, three hundred twelve thousand, three hundred thirteen".