205413237 has 12 divisors (see below), whose sum is σ = 312324480. Its totient is φ = 129734568.

The previous prime is 205413211. The next prime is 205413251. The reversal of 205413237 is 732314502.

It is a de Polignac number, because none of the positive numbers 2^k-205413237 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 205413237.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (205413137) 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 11 ways as a sum of consecutive naturals, for example, 600453 + ... + 600794.

It is an arithmetic number, because the mean of its divisors is an integer number (26027040).

Almost surely, 2^205413237 is an apocalyptic number.

It is an amenable number.

205413237 is a deficient number, since it is larger than the sum of its proper divisors (106911243).

205413237 is a wasteful number, since it uses less digits than its factorization.

205413237 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1201272 (or 1201269 counting only the distinct ones).

The product of its (nonzero) digits is 5040, while the sum is 27.

The square root of 205413237 is about 14332.2446602059. The cubic root of 205413237 is about 590.0327828188.

Adding to 205413237 its reverse (732314502), we get a palindrome (937727739).

The spelling of 205413237 in words is "two hundred five million, four hundred thirteen thousand, two hundred thirty-seven".