3131816 has 16 divisors (see below), whose sum is σ = 5894100. Its totient is φ = 1560064.

The previous prime is 3131771. The next prime is 3131833. The reversal of 3131816 is 6181313.

It can be written as a sum of positive squares in 2 ways, for example, as 2709316 + 422500 = 1646^2 + 650^2 .

It is a junction number, because it is equal to n+sod(n) for n = 3131791 and 3131800.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2270 + ... + 3378.

Almost surely, 2^3131816 is an apocalyptic number.

It is an amenable number.

3131816 is a deficient number, since it is larger than the sum of its proper divisors (2762284).

3131816 is a wasteful number, since it uses less digits than its factorization.

3131816 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1468 (or 1464 counting only the distinct ones).

The product of its digits is 432, while the sum is 23.

The square root of 3131816 is about 1769.6937588182. The cubic root of 3131816 is about 146.3071036171.

The spelling of 3131816 in words is "three million, one hundred thirty-one thousand, eight hundred sixteen".