2837221 has 2 divisors, whose sum is σ = 2837222. Its totient is φ = 2837220.

The previous prime is 2837209. The next prime is 2837227. The reversal of 2837221 is 1227382.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1809025 + 1028196 = 1345^2 + 1014^2 .

It is a cyclic number.

It is not a de Polignac number, because 2837221 - 2¹⁷ = 2706149 is a prime.

2837221 is a lucky number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2837227) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1418610 + 1418611.

It is an arithmetic number, because the mean of its divisors is an integer number (1418611).

2^2837221 is an apocalyptic number.

It is an amenable number.

2837221 is a deficient number, since it is larger than the sum of its proper divisors (1).

2837221 is an equidigital number, since it uses as much as digits as its factorization.

2837221 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1344, while the sum is 25.

The square root of 2837221 is about 1684.4052362778. The cubic root of 2837221 is about 141.5677691918.

It can be divided in two parts, 28 and 37221, that added together give a square (37249 = 193²).

The spelling of 2837221 in words is "two million, eight hundred thirty-seven thousand, two hundred twenty-one".