203311242 has 16 divisors (see below), whose sum is σ = 451802880. Its totient is φ = 67770396.

The previous prime is 203311223. The next prime is 203311247. The reversal of 203311242 is 242113302.

It is a super-2 number, since 2×203311242² = 82670922247165128, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is not an unprimeable number, because it can be changed into a prime (203311247) 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, 1882458 + ... + 1882565.

It is an arithmetic number, because the mean of its divisors is an integer number (28237680).

Almost surely, 2^203311242 is an apocalyptic number.

203311242 is an abundant number, since it is smaller than the sum of its proper divisors (248491638).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

203311242 is a wasteful number, since it uses less digits than its factorization.

203311242 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3765034 (or 3765028 counting only the distinct ones).

The product of its (nonzero) digits is 288, while the sum is 18.

The square root of 203311242 is about 14258.7251183267. The cubic root of 203311242 is about 588.0132754187.

Adding to 203311242 its reverse (242113302), we get a palindrome (445424544).

The spelling of 203311242 in words is "two hundred three million, three hundred eleven thousand, two hundred forty-two".