2353221 has 12 divisors (see below), whose sum is σ = 3660748. Its totient is φ = 1448064.

The previous prime is 2353217. The next prime is 2353223. The reversal of 2353221 is 1223532.

It can be written as a sum of positive squares in 2 ways, for example, as 236196 + 2117025 = 486^2 + 1455^2 .

It is not a de Polignac number, because 2353221 - 2² = 2353217 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 2353194 and 2353203.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2353223) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 9940 + ... + 10173.

2^2353221 is an apocalyptic number.

It is an amenable number.

2353221 is a deficient number, since it is larger than the sum of its proper divisors (1307527).

2353221 is a wasteful number, since it uses less digits than its factorization.

2353221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20132 (or 20129 counting only the distinct ones).

The product of its digits is 360, while the sum is 18.

The square root of 2353221 is about 1534.0211862944. The cubic root of 2353221 is about 133.0110040455.

Adding to 2353221 its reverse (1223532), we get a palindrome (3576753).

The spelling of 2353221 in words is "two million, three hundred fifty-three thousand, two hundred twenty-one".