312011113 has 4 divisors (see below), whose sum is σ = 312937300. Its totient is φ = 311084928.

The previous prime is 312011111. The next prime is 312011137. The reversal of 312011113 is 311110213.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 207705744 + 104305369 = 14412^2 + 10213^2 .

It is a cyclic number.

It is not a de Polignac number, because 312011113 - 2¹ = 312011111 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 312011093 and 312011102.

It is not an unprimeable number, because it can be changed into a prime (312011111) 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, 462588 + ... + 463261.

It is an arithmetic number, because the mean of its divisors is an integer number (78234325).

Almost surely, 2^312011113 is an apocalyptic number.

It is an amenable number.

312011113 is a deficient number, since it is larger than the sum of its proper divisors (926187).

312011113 is an equidigital number, since it uses as much as digits as its factorization.

312011113 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 926186.

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

The square root of 312011113 is about 17663.8363047216. The cubic root of 312011113 is about 678.2503411852.

Adding to 312011113 its reverse (311110213), we get a palindrome (623121326).

The spelling of 312011113 in words is "three hundred twelve million, eleven thousand, one hundred thirteen".