253421213 has 4 divisors (see below), whose sum is σ = 254187168. Its totient is φ = 252655260.

The previous prime is 253421209. The next prime is 253421237. The reversal of 253421213 is 312124352.

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 253421213 - 2² = 253421209 is a prime.

It is a super-2 number, since 2×253421213² = 128444622396782738, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (253421263) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 382481 + ... + 383142.

It is an arithmetic number, because the mean of its divisors is an integer number (63546792).

Almost surely, 2^253421213 is an apocalyptic number.

It is an amenable number.

253421213 is a deficient number, since it is larger than the sum of its proper divisors (765955).

253421213 is an equidigital number, since it uses as much as digits as its factorization.

253421213 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 765954.

The product of its digits is 1440, while the sum is 23.

The square root of 253421213 is about 15919.2089313508. The cubic root of 253421213 is about 632.8211541159.

Adding to 253421213 its reverse (312124352), we get a palindrome (565545565).

The spelling of 253421213 in words is "two hundred fifty-three million, four hundred twenty-one thousand, two hundred thirteen".