3181213 has 8 divisors (see below), whose sum is σ = 3761280. Its totient is φ = 2632560.

The previous prime is 3181207. The next prime is 3181229. The reversal of 3181213 is 3121813.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 3181213 - 2⁵ = 3181181 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3181253) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 7633 + ... + 8038.

It is an arithmetic number, because the mean of its divisors is an integer number (470160).

Almost surely, 2^3181213 is an apocalyptic number.

It is an amenable number.

3181213 is a deficient number, since it is larger than the sum of its proper divisors (580067).

3181213 is a wasteful number, since it uses less digits than its factorization.

3181213 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15707.

The product of its digits is 144, while the sum is 19.

The square root of 3181213 is about 1783.5955258971. The cubic root of 3181213 is about 147.0723108226.

The spelling of 3181213 in words is "three million, one hundred eighty-one thousand, two hundred thirteen".