204242413 has 4 divisors (see below), whose sum is σ = 206827840. Its totient is φ = 201656988.

The previous prime is 204242411. The next prime is 204242417. The reversal of 204242413 is 314242402.

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: 314242402 = 2 ⋅157121201.

It is a cyclic number.

It is not a de Polignac number, because 204242413 - 2¹ = 204242411 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 (204242411) 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, 1292595 + ... + 1292752.

It is an arithmetic number, because the mean of its divisors is an integer number (51706960).

Almost surely, 2^204242413 is an apocalyptic number.

It is an amenable number.

204242413 is a deficient number, since it is larger than the sum of its proper divisors (2585427).

204242413 is an equidigital number, since it uses as much as digits as its factorization.

204242413 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2585426.

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

The square root of 204242413 is about 14291.3404899610. The cubic root of 204242413 is about 588.9096139707.

Adding to 204242413 its reverse (314242402), we get a palindrome (518484815).

The spelling of 204242413 in words is "two hundred four million, two hundred forty-two thousand, four hundred thirteen".