205442237 has 16 divisors (see below), whose sum is σ = 275839872. Its totient is φ = 147769920.

The previous prime is 205442213. The next prime is 205442287. The reversal of 205442237 is 732244502.

It is a cyclic number.

It is not a de Polignac number, because 205442237 - 2⁸ = 205441981 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (205442287) 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 15 ways as a sum of consecutive naturals, for example, 101618 + ... + 103619.

It is an arithmetic number, because the mean of its divisors is an integer number (17239992).

Almost surely, 2^205442237 is an apocalyptic number.

It is an amenable number.

205442237 is a deficient number, since it is larger than the sum of its proper divisors (70397635).

205442237 is a wasteful number, since it uses less digits than its factorization.

205442237 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 205268.

The product of its (nonzero) digits is 13440, while the sum is 29.

The square root of 205442237 is about 14333.2563292505. The cubic root of 205442237 is about 590.0605482245.

Adding to 205442237 its reverse (732244502), we get a palindrome (937686739).

The spelling of 205442237 in words is "two hundred five million, four hundred forty-two thousand, two hundred thirty-seven".