253343221 has 4 divisors (see below), whose sum is σ = 253465344. Its totient is φ = 253221100.

The previous prime is 253343219. The next prime is 253343243. The reversal of 253343221 is 122343352.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 253343221 - 2¹ = 253343219 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (253343201) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 57895 + ... + 62116.

It is an arithmetic number, because the mean of its divisors is an integer number (63366336).

Almost surely, 2^253343221 is an apocalyptic number.

It is an amenable number.

253343221 is a deficient number, since it is larger than the sum of its proper divisors (122123).

253343221 is a wasteful number, since it uses less digits than its factorization.

253343221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 122122.

The product of its digits is 4320, while the sum is 25.

The square root of 253343221 is about 15916.7591236407. The cubic root of 253343221 is about 632.7562292018.

Adding to 253343221 its reverse (122343352), we get a palindrome (375686573).

It can be divided in two parts, 2533 and 43221, that added together give a palindrome (45754).

The spelling of 253343221 in words is "two hundred fifty-three million, three hundred forty-three thousand, two hundred twenty-one".