3581213 has 4 divisors (see below), whose sum is σ = 3696768. Its totient is φ = 3465660.

The previous prime is 3581191. The next prime is 3581219. The reversal of 3581213 is 3121853.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 3581213 - 2⁸ = 3580957 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 (3581219) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 57731 + ... + 57792.

It is an arithmetic number, because the mean of its divisors is an integer number (924192).

Almost surely, 2^3581213 is an apocalyptic number.

It is an amenable number.

3581213 is a deficient number, since it is larger than the sum of its proper divisors (115555).

3581213 is a wasteful number, since it uses less digits than its factorization.

3581213 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 115554.

The product of its digits is 720, while the sum is 23.

The square root of 3581213 is about 1892.4093109050. The cubic root of 3581213 is about 152.9948166327.

The spelling of 3581213 in words is "three million, five hundred eighty-one thousand, two hundred thirteen".