3133221 has 32 divisors (see below), whose sum is σ = 5376000. Its totient is φ = 1577664.

The previous prime is 3133213. The next prime is 3133237. The reversal of 3133221 is 1223313.

It is not a de Polignac number, because 3133221 - 2³ = 3133213 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 3133221.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3133211) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 6030 + ... + 6528.

It is an arithmetic number, because the mean of its divisors is an integer number (168000).

Almost surely, 2^3133221 is an apocalyptic number.

It is an amenable number.

3133221 is a deficient number, since it is larger than the sum of its proper divisors (2242779).

3133221 is a wasteful number, since it uses less digits than its factorization.

3133221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 545.

The product of its digits is 108, while the sum is 15.

The square root of 3133221 is about 1770.0906756435. The cubic root of 3133221 is about 146.3289791837.

Adding to 3133221 its reverse (1223313), we get a palindrome (4356534).

The spelling of 3133221 in words is "three million, one hundred thirty-three thousand, two hundred twenty-one".