313111111 has 4 divisors (see below), whose sum is σ = 315983800. Its totient is φ = 310238424.

The previous prime is 313111093. The next prime is 313111153. The reversal of 313111111 is 111111313.

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

It is a cyclic number.

It is not a de Polignac number, because 313111111 - 2¹⁷ = 312980039 is a prime.

It is a Duffinian number.

313111111 is a modest number, since divided by 11111 gives 3131 as remainder.

It is a junction number, because it is equal to n+sod(n) for n = 313111091 and 313111100.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (313111181) 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, 1436181 + ... + 1436398.

It is an arithmetic number, because the mean of its divisors is an integer number (78995950).

Almost surely, 2^313111111 is an apocalyptic number.

313111111 is a deficient number, since it is larger than the sum of its proper divisors (2872689).

313111111 is a wasteful number, since it uses less digits than its factorization.

313111111 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2872688.

The product of its digits is 9, while the sum is 13.

The square root of 313111111 is about 17694.9459168430. The cubic root of 313111111 is about 679.0464655724.

Adding to 313111111 its reverse (111111313), we get a palindrome (424222424).

It can be divided in two parts, 313 and 111111, that multiplied together give a palindrome (34777743).

The spelling of 313111111 in words is "three hundred thirteen million, one hundred eleven thousand, one hundred eleven".