206434156 has 12 divisors (see below), whose sum is σ = 367383240. Its totient is φ = 101467520.

The previous prime is 206434147. The next prime is 206434229. The reversal of 206434156 is 651434602.

It is an unprimeable number.

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 3 ways as a sum of consecutive naturals, for example, 437125 + ... + 437596.

It is an arithmetic number, because the mean of its divisors is an integer number (30615270).

Almost surely, 2^206434156 is an apocalyptic number.

It is an amenable number.

206434156 is a deficient number, since it is larger than the sum of its proper divisors (160949084).

206434156 is a wasteful number, since it uses less digits than its factorization.

206434156 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 874784 (or 874782 counting only the distinct ones).

The product of its (nonzero) digits is 17280, while the sum is 31.

The square root of 206434156 is about 14367.8166747770. The cubic root of 206434156 is about 591.0086700648.

Adding to 206434156 its reverse (651434602), we get a palindrome (857868758).

The spelling of 206434156 in words is "two hundred six million, four hundred thirty-four thousand, one hundred fifty-six".