3135221 has 2 divisors, whose sum is σ = 3135222. Its totient is φ = 3135220.

The previous prime is 3135211. The next prime is 3135227. The reversal of 3135221 is 1225313.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 2686321 + 448900 = 1639^2 + 670^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-3135221 is a prime.

It is a super-2 number, since 2×3135221² = 19659221437682, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 3135221.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (3135227) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1567610 + 1567611.

It is an arithmetic number, because the mean of its divisors is an integer number (1567611).

Almost surely, 2^3135221 is an apocalyptic number.

It is an amenable number.

3135221 is a deficient number, since it is larger than the sum of its proper divisors (1).

3135221 is an equidigital number, since it uses as much as digits as its factorization.

3135221 is an evil number, because the sum of its binary digits is even.

The product of its digits is 180, while the sum is 17.

The square root of 3135221 is about 1770.6555283284. The cubic root of 3135221 is about 146.3601075029.

The spelling of 3135221 in words is "three million, one hundred thirty-five thousand, two hundred twenty-one".