3113521 has 2 divisors, whose sum is σ = 3113522. Its totient is φ = 3113520.

The previous prime is 3113497. The next prime is 3113531. The reversal of 3113521 is 1253113.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 2143296 + 970225 = 1464^2 + 985^2 .

It is a cyclic number.

It is not a de Polignac number, because 3113521 - 2⁷ = 3113393 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 3113495 and 3113504.

It is not a weakly prime, because it can be changed into another prime (3113531) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1556760 + 1556761.

It is an arithmetic number, because the mean of its divisors is an integer number (1556761).

Almost surely, 2^3113521 is an apocalyptic number.

It is an amenable number.

3113521 is a deficient number, since it is larger than the sum of its proper divisors (1).

3113521 is an equidigital number, since it uses as much as digits as its factorization.

3113521 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 3113521 is about 1764.5172144244. The cubic root of 3113521 is about 146.0216550102.

Adding to 3113521 its reverse (1253113), we get a palindrome (4366634).

The spelling of 3113521 in words is "three million, one hundred thirteen thousand, five hundred twenty-one".