3131626 has 4 divisors (see below), whose sum is σ = 4697442. Its totient is φ = 1565812.

The previous prime is 3131603. The next prime is 3131629. The reversal of 3131626 is 6261313.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 6261313 = 23 ⋅272231.

It can be written as a sum of positive squares in only one way, i.e., 2886601 + 245025 = 1699^2 + 495^2 .

It is a super-3 number, since 3×3131626³ = 92136333325483747128, which contains 333 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 3131597 and 3131606.

It is not an unprimeable number, because it can be changed into a prime (3131629) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 782905 + ... + 782908.

Almost surely, 2^3131626 is an apocalyptic number.

3131626 is a deficient number, since it is larger than the sum of its proper divisors (1565816).

3131626 is a wasteful number, since it uses less digits than its factorization.

3131626 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1565815.

The product of its digits is 648, while the sum is 22.

The square root of 3131626 is about 1769.6400763997. The cubic root of 3131626 is about 146.3041448532.

Adding to 3131626 its reverse (6261313), we get a palindrome (9392939).

The spelling of 3131626 in words is "three million, one hundred thirty-one thousand, six hundred twenty-six".