201156806 has 16 divisors (see below), whose sum is σ = 304290000. Its totient is φ = 99730848.

The previous prime is 201156803. The next prime is 201156841. The reversal of 201156806 is 608651102.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (201156803) 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 7 ways as a sum of consecutive naturals, for example, 133445 + ... + 134943.

It is an arithmetic number, because the mean of its divisors is an integer number (19018125).

Almost surely, 2^201156806 is an apocalyptic number.

201156806 is a deficient number, since it is larger than the sum of its proper divisors (103133194).

201156806 is a wasteful number, since it uses less digits than its factorization.

201156806 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2023.

The product of its (nonzero) digits is 2880, while the sum is 29.

The square root of 201156806 is about 14182.9759218579. The cubic root of 201156806 is about 585.9288878440.

The spelling of 201156806 in words is "two hundred one million, one hundred fifty-six thousand, eight hundred six".