206156042 has 16 divisors (see below), whose sum is σ = 344658240. Its totient is φ = 91908288.

The previous prime is 206156039. The next prime is 206156047. The reversal of 206156042 is 240651602.

It is not an unprimeable number, because it can be changed into a prime (206156047) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 158918 + ... + 160209.

It is an arithmetic number, because the mean of its divisors is an integer number (21541140).

Almost surely, 2^206156042 is an apocalyptic number.

206156042 is a deficient number, since it is larger than the sum of its proper divisors (138502198).

206156042 is a wasteful number, since it uses less digits than its factorization.

206156042 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 319165.

The product of its (nonzero) digits is 2880, while the sum is 26.

The square root of 206156042 is about 14358.1350460288. The cubic root of 206156042 is about 590.7431428584.

It can be divided in two parts, 2061560 and 42, that added together give a palindrome (2061602).

The spelling of 206156042 in words is "two hundred six million, one hundred fifty-six thousand, forty-two".