201311242 has 16 divisors (see below), whose sum is σ = 330155712. Its totient is φ = 91300320.

The previous prime is 201311239. The next prime is 201311291. The reversal of 201311242 is 242113102.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 43 + ... + 20065.

It is an arithmetic number, because the mean of its divisors is an integer number (20634732).

Almost surely, 2^201311242 is an apocalyptic number.

201311242 is a gapful number since it is divisible by the number (22) formed by its first and last digit.

201311242 is a deficient number, since it is larger than the sum of its proper divisors (128844470).

201311242 is a wasteful number, since it uses less digits than its factorization.

201311242 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20493.

The product of its (nonzero) digits is 96, while the sum is 16.

The square root of 201311242 is about 14188.4192918027. The cubic root of 201311242 is about 586.0787963792.

Adding to 201311242 its reverse (242113102), we get a palindrome (443424344).

The spelling of 201311242 in words is "two hundred one million, three hundred eleven thousand, two hundred forty-two".