3121316 has 18 divisors (see below), whose sum is σ = 6004950. Its totient is φ = 1418560.

The previous prime is 3121303. The next prime is 3121333. The reversal of 3121316 is 6131213.

It can be written as a sum of positive squares in only one way, i.e., 3097600 + 23716 = 1760^2 + 154^2 .

It is a super-2 number, since 2×3121316² = 19485227143712, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 3121294 and 3121303.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 2741 + ... + 3708.

Almost surely, 2^3121316 is an apocalyptic number.

It is an amenable number.

3121316 is a deficient number, since it is larger than the sum of its proper divisors (2883634).

3121316 is a wasteful number, since it uses less digits than its factorization.

3121316 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6475 (or 6462 counting only the distinct ones).

The product of its digits is 108, while the sum is 17.

The square root of 3121316 is about 1766.7246531364. The cubic root of 3121316 is about 146.1434132193.

Adding to 3121316 its reverse (6131213), we get a palindrome (9252529).

The spelling of 3121316 in words is "three million, one hundred twenty-one thousand, three hundred sixteen".