3131361 has 6 divisors (see below), whose sum is σ = 4523090. Its totient is φ = 2087568.

The previous prime is 3131357. The next prime is 3131369. The reversal of 3131361 is 1631313.

It can be written as a sum of positive squares in only one way, i.e., 2954961 + 176400 = 1719^2 + 420^2 .

It is not a de Polignac number, because 3131361 - 2² = 3131357 is a prime.

It is an Ulam number.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (3131369) 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, 173956 + ... + 173973.

Almost surely, 2^3131361 is an apocalyptic number.

It is an amenable number.

3131361 is a deficient number, since it is larger than the sum of its proper divisors (1391729).

3131361 is a wasteful number, since it uses less digits than its factorization.

3131361 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 347935 (or 347932 counting only the distinct ones).

The product of its digits is 162, while the sum is 18.

The square root of 3131361 is about 1769.5652008332. The cubic root of 3131361 is about 146.3000179564.

Adding to 3131361 its reverse (1631313), we get a palindrome (4762674).

The spelling of 3131361 in words is "three million, one hundred thirty-one thousand, three hundred sixty-one".