205145413 has 16 divisors (see below), whose sum is σ = 236067840. Its totient is φ = 176310000.

The previous prime is 205145407. The next prime is 205145417. The reversal of 205145413 is 314541502.

It is a happy number.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-205145413 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 (205145417) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 156306 + ... + 157612.

It is an arithmetic number, because the mean of its divisors is an integer number (14754240).

Almost surely, 2^205145413 is an apocalyptic number.

It is an amenable number.

205145413 is a deficient number, since it is larger than the sum of its proper divisors (30922427).

205145413 is a wasteful number, since it uses less digits than its factorization.

205145413 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2088.

The product of its (nonzero) digits is 2400, while the sum is 25.

The square root of 205145413 is about 14322.8982053214. The cubic root of 205145413 is about 589.7762370847.

Adding to 205145413 its reverse (314541502), we get a palindrome (519686915).

The spelling of 205145413 in words is "two hundred five million, one hundred forty-five thousand, four hundred thirteen".