3191213 has 4 divisors (see below), whose sum is σ = 3277500. Its totient is φ = 3104928.

The previous prime is 3191207. The next prime is 3191219. The reversal of 3191213 is 3121913.

3191213 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes.

It is an interprime number because it is at equal distance from previous prime (3191207) and next prime (3191219).

It can be written as a sum of positive squares in 2 ways, for example, as 3020644 + 170569 = 1738^2 + 413^2 .

It is a cyclic number.

It is not a de Polignac number, because 3191213 - 2⁴ = 3191197 is a prime.

It is a super-2 number, since 2×3191213² = 20367680822738, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3191219) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 43088 + ... + 43161.

It is an arithmetic number, because the mean of its divisors is an integer number (819375).

Almost surely, 2^3191213 is an apocalyptic number.

It is an amenable number.

3191213 is a deficient number, since it is larger than the sum of its proper divisors (86287).

3191213 is an equidigital number, since it uses as much as digits as its factorization.

3191213 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 86286.

The product of its digits is 162, while the sum is 20.

The square root of 3191213 is about 1786.3966524823. The cubic root of 3191213 is about 147.2262546949.

The spelling of 3191213 in words is "three million, one hundred ninety-one thousand, two hundred thirteen".