313111421 has 6 divisors (see below), whose sum is σ = 364231710. Its totient is φ = 268381176.

The previous prime is 313111417. The next prime is 313111433. The reversal of 313111421 is 124111313.

It can be written as a sum of positive squares in only one way, i.e., 253605625 + 59505796 = 15925^2 + 7714^2 .

It is not a de Polignac number, because 313111421 - 2² = 313111417 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 313111421.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (313111411) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 3194966 + ... + 3195063.

It is an arithmetic number, because the mean of its divisors is an integer number (60705285).

Almost surely, 2^313111421 is an apocalyptic number.

It is an amenable number.

313111421 is a deficient number, since it is larger than the sum of its proper divisors (51120289).

313111421 is an equidigital number, since it uses as much as digits as its factorization.

313111421 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6390043 (or 6390036 counting only the distinct ones).

The product of its digits is 72, while the sum is 17.

The square root of 313111421 is about 17694.9546764042. The cubic root of 313111421 is about 679.0466896721.

Adding to 313111421 its reverse (124111313), we get a palindrome (437222734).

The spelling of 313111421 in words is "three hundred thirteen million, one hundred eleven thousand, four hundred twenty-one".