3131613 has 6 divisors (see below), whose sum is σ = 4523454. Its totient is φ = 2087736.

The previous prime is 3131603. The next prime is 3131629. The reversal of 3131613 is 3161313.

It can be written as a sum of positive squares in only one way, i.e., 1734489 + 1397124 = 1317^2 + 1182^2 .

It is not a de Polignac number, because 3131613 - 2⁶ = 3131549 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3131603) 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, 173970 + ... + 173987.

It is an arithmetic number, because the mean of its divisors is an integer number (753909).

Almost surely, 2^3131613 is an apocalyptic number.

It is an amenable number.

3131613 is a deficient number, since it is larger than the sum of its proper divisors (1391841).

3131613 is a wasteful number, since it uses less digits than its factorization.

3131613 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 347963 (or 347960 counting only the distinct ones).

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

The square root of 3131613 is about 1769.6364033326. The cubic root of 3131613 is about 146.3039424071.

Adding to 3131613 its reverse (3161313), we get a palindrome (6292926).

It can be divided in two parts, 31316 and 13, that added together give a square (31329 = 177²).

The spelling of 3131613 in words is "three million, one hundred thirty-one thousand, six hundred thirteen".