204243345 has 48 divisors (see below), whose sum is σ = 374459904. Its totient is φ = 102816000.

The previous prime is 204243343. The next prime is 204243353. The reversal of 204243345 is 543342402.

It is not a de Polignac number, because 204243345 - 2¹ = 204243343 is a prime.

It is not an unprimeable number, because it can be changed into a prime (204243343) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 55410 + ... + 58980.

It is an arithmetic number, because the mean of its divisors is an integer number (7801248).

Almost surely, 2^204243345 is an apocalyptic number.

It is an amenable number.

204243345 is a deficient number, since it is larger than the sum of its proper divisors (170216559).

204243345 is a wasteful number, since it uses less digits than its factorization.

204243345 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3654 (or 3651 counting only the distinct ones).

The product of its (nonzero) digits is 11520, while the sum is 27.

The square root of 204243345 is about 14291.3730970820. The cubic root of 204243345 is about 588.9105097411.

Adding to 204243345 its reverse (543342402), we get a palindrome (747585747).

The spelling of 204243345 in words is "two hundred four million, two hundred forty-three thousand, three hundred forty-five".