424243213 has 4 divisors (see below), whose sum is σ = 425227968. Its totient is φ = 423258460.

The previous prime is 424243199. The next prime is 424243231. The reversal of 424243213 is 312342424.

It is a happy number.

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 424243213 - 2⁵ = 424243181 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 (424243013) 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, 491731 + ... + 492592.

It is an arithmetic number, because the mean of its divisors is an integer number (106306992).

Almost surely, 2^424243213 is an apocalyptic number.

It is an amenable number.

424243213 is a deficient number, since it is larger than the sum of its proper divisors (984755).

424243213 is an equidigital number, since it uses as much as digits as its factorization.

424243213 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 984754.

The product of its digits is 4608, while the sum is 25.

The square root of 424243213 is about 20597.1651690227. The cubic root of 424243213 is about 751.4007676527.

Adding to 424243213 its reverse (312342424), we get a palindrome (736585637).

The spelling of 424243213 in words is "four hundred twenty-four million, two hundred forty-three thousand, two hundred thirteen".