206431042 has 4 divisors (see below), whose sum is σ = 309646566. Its totient is φ = 103215520.

The previous prime is 206431037. The next prime is 206431061. The reversal of 206431042 is 240134602.

It is a happy number.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 206238321 + 192721 = 14361^2 + 439^2 .

It is a super-2 number, since 2×206431042² = 85227550202411528, which contains 22 as substring.

It is a Smith number, since the sum of its digits (22) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 51607759 + ... + 51607762.

Almost surely, 2^206431042 is an apocalyptic number.

206431042 is a deficient number, since it is larger than the sum of its proper divisors (103215524).

206431042 is a wasteful number, since it uses less digits than its factorization.

206431042 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 103215523.

The product of its (nonzero) digits is 1152, while the sum is 22.

The square root of 206431042 is about 14367.7083071727. The cubic root of 206431042 is about 591.0056983178.

Adding to 206431042 its reverse (240134602), we get a palindrome (446565644).

The spelling of 206431042 in words is "two hundred six million, four hundred thirty-one thousand, forty-two".