3221557 has 2 divisors, whose sum is σ = 3221558. Its totient is φ = 3221556.

The previous prime is 3221549. The next prime is 3221567. The reversal of 3221557 is 7551223.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 2193361 + 1028196 = 1481^2 + 1014^2 .

It is a cyclic number.

It is not a de Polignac number, because 3221557 - 2³ = 3221549 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (3221567) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1610778 + 1610779.

It is an arithmetic number, because the mean of its divisors is an integer number (1610779).

Almost surely, 2^3221557 is an apocalyptic number.

It is an amenable number.

3221557 is a deficient number, since it is larger than the sum of its proper divisors (1).

3221557 is an equidigital number, since it uses as much as digits as its factorization.

3221557 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 2100, while the sum is 25.

The square root of 3221557 is about 1794.8696331489. The cubic root of 3221557 is about 147.6914224442.

The spelling of 3221557 in words is "three million, two hundred twenty-one thousand, five hundred fifty-seven".