313112421 has 6 divisors (see below), whose sum is σ = 452273510. Its totient is φ = 208741608.

The previous prime is 313112407. The next prime is 313112441. The reversal of 313112421 is 124211313.

It can be written as a sum of positive squares in only one way, i.e., 306425025 + 6687396 = 17505^2 + 2586^2 .

It is not a de Polignac number, because 313112421 - 2¹⁵ = 313079653 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 313112394 and 313112403.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (313112441) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 17395126 + ... + 17395143.

Almost surely, 2^313112421 is an apocalyptic number.

It is an amenable number.

313112421 is a deficient number, since it is larger than the sum of its proper divisors (139161089).

313112421 is a wasteful number, since it uses less digits than its factorization.

313112421 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 34790275 (or 34790272 counting only the distinct ones).

The product of its digits is 144, while the sum is 18.

The square root of 313112421 is about 17694.9829330237. The cubic root of 313112421 is about 679.0474125734.

Adding to 313112421 its reverse (124211313), we get a palindrome (437323734).

The spelling of 313112421 in words is "three hundred thirteen million, one hundred twelve thousand, four hundred twenty-one".