242404213 has 4 divisors (see below), whose sum is σ = 242759808. Its totient is φ = 242048620.

The previous prime is 242404193. The next prime is 242404237. The reversal of 242404213 is 312404242.

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, and also an emirpimes, since its reverse is a distinct semiprime: 312404242 = 2 ⋅156202121.

It is a cyclic number.

It is not a de Polignac number, because 242404213 - 2⁵ = 242404181 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 (242401213) 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, 176773 + ... + 178138.

It is an arithmetic number, because the mean of its divisors is an integer number (60689952).

Almost surely, 2^242404213 is an apocalyptic number.

It is an amenable number.

242404213 is a deficient number, since it is larger than the sum of its proper divisors (355595).

242404213 is an equidigital number, since it uses as much as digits as its factorization.

242404213 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 355594.

The product of its (nonzero) digits is 1536, while the sum is 22.

The square root of 242404213 is about 15569.3356634122. The cubic root of 242404213 is about 623.5147349363.

Adding to 242404213 its reverse (312404242), we get a palindrome (554808455).

The spelling of 242404213 in words is "two hundred forty-two million, four hundred four thousand, two hundred thirteen".