3121313 has 4 divisors (see below), whose sum is σ = 3361428. Its totient is φ = 2881200.

The previous prime is 3121303. The next prime is 3121333. The reversal of 3121313 is 3131213.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 3131213 = 17 ⋅184189.

It can be written as a sum of positive squares in 2 ways, for example, as 2155024 + 966289 = 1468^2 + 983^2 .

It is a cyclic number.

It is not a de Polignac number, because 3121313 - 2⁶ = 3121249 is a prime.

It is a Duffinian number.

3121313 is a modest number, since divided by 1313 gives 312 as remainder.

It is not an unprimeable number, because it can be changed into a prime (3121303) 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, 120038 + ... + 120063.

It is an arithmetic number, because the mean of its divisors is an integer number (840357).

Almost surely, 2^3121313 is an apocalyptic number.

It is an amenable number.

3121313 is a deficient number, since it is larger than the sum of its proper divisors (240115).

3121313 is a wasteful number, since it uses less digits than its factorization.

3121313 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 240114.

The product of its digits is 54, while the sum is 14.

The square root of 3121313 is about 1766.7238041075. The cubic root of 3121313 is about 146.1433663982.

Adding to 3121313 its reverse (3131213), we get a palindrome (6252526).

It can be divided in two parts, 31213 and 13, that multiplied together give a square (405769 = 637²).

The spelling of 3121313 in words is "three million, one hundred twenty-one thousand, three hundred thirteen".