3311521 has 2 divisors, whose sum is σ = 3311522. Its totient is φ = 3311520.

The previous prime is 3311519. The next prime is 3311527. The reversal of 3311521 is 1251133.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 2907025 + 404496 = 1705^2 + 636^2 .

It is a cyclic number.

It is not a de Polignac number, because 3311521 - 2¹ = 3311519 is a prime.

Together with 3311519, it forms a pair of twin primes.

It is a junction number, because it is equal to n+sod(n) for n = 3311495 and 3311504.

It is not a weakly prime, because it can be changed into another prime (3311527) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1655760 + 1655761.

It is an arithmetic number, because the mean of its divisors is an integer number (1655761).

Almost surely, 2^3311521 is an apocalyptic number.

It is an amenable number.

3311521 is a deficient number, since it is larger than the sum of its proper divisors (1).

3311521 is an equidigital number, since it uses as much as digits as its factorization.

3311521 is an evil number, because the sum of its binary digits is even.

The product of its digits is 90, while the sum is 16.

The square root of 3311521 is about 1819.7585004610. The cubic root of 3311521 is about 149.0536119253.

Adding to 3311521 its reverse (1251133), we get a palindrome (4562654).

The spelling of 3311521 in words is "three million, three hundred eleven thousand, five hundred twenty-one".