3221131 has 4 divisors (see below), whose sum is σ = 3227472. Its totient is φ = 3214792.

The previous prime is 3221129. The next prime is 3221137. The reversal of 3221131 is 1311223.

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

It is a cyclic number.

It is not a de Polignac number, because 3221131 - 2¹ = 3221129 is a prime.

It is a super-2 number, since 2×3221131² = 20751369838322, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (3221137) 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, 2335 + ... + 3448.

It is an arithmetic number, because the mean of its divisors is an integer number (806868).

Almost surely, 2^3221131 is an apocalyptic number.

3221131 is a deficient number, since it is larger than the sum of its proper divisors (6341).

3221131 is an equidigital number, since it uses as much as digits as its factorization.

3221131 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6340.

The product of its digits is 36, while the sum is 13.

The square root of 3221131 is about 1794.7509576540. The cubic root of 3221131 is about 147.6849122051.

Adding to 3221131 its reverse (1311223), we get a palindrome (4532354).

The spelling of 3221131 in words is "three million, two hundred twenty-one thousand, one hundred thirty-one".