201155242 has 16 divisors (see below), whose sum is σ = 317892960. Its totient is φ = 95200272.

The previous prime is 201155221. The next prime is 201155267. The reversal of 201155242 is 242551102.

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 7 ways as a sum of consecutive naturals, for example, 73633 + ... + 76315.

It is an arithmetic number, because the mean of its divisors is an integer number (19868310).

Almost surely, 2^201155242 is an apocalyptic number.

201155242 is a deficient number, since it is larger than the sum of its proper divisors (116737718).

201155242 is a wasteful number, since it uses less digits than its factorization.

201155242 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4677.

The product of its (nonzero) digits is 800, while the sum is 22.

The square root of 201155242 is about 14182.9207852262. The cubic root of 201155242 is about 585.9273693021.

The spelling of 201155242 in words is "two hundred one million, one hundred fifty-five thousand, two hundred forty-two".