3131641 has 2 divisors, whose sum is σ = 3131642. Its totient is φ = 3131640.

The previous prime is 3131629. The next prime is 3131669. The reversal of 3131641 is 1461313.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1679616 + 1452025 = 1296^2 + 1205^2 .

It is a cyclic number.

It is not a de Polignac number, because 3131641 - 2¹⁵ = 3098873 is a prime.

It is not a weakly prime, because it can be changed into another prime (3131671) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1565820 + 1565821.

It is an arithmetic number, because the mean of its divisors is an integer number (1565821).

Almost surely, 2^3131641 is an apocalyptic number.

It is an amenable number.

3131641 is a deficient number, since it is larger than the sum of its proper divisors (1).

3131641 is an equidigital number, since it uses as much as digits as its factorization.

3131641 is an evil number, because the sum of its binary digits is even.

The product of its digits is 216, while the sum is 19.

The square root of 3131641 is about 1769.6443145446. The cubic root of 3131641 is about 146.3043784442.

Adding to 3131641 its reverse (1461313), we get a palindrome (4592954).

The spelling of 3131641 in words is "three million, one hundred thirty-one thousand, six hundred forty-one".