242142311 has 4 divisors (see below), whose sum is σ = 242244912. Its totient is φ = 242039712.

The previous prime is 242142253. The next prime is 242142323. The reversal of 242142311 is 113241242.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 242142311 - 2⁶ = 242142247 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (242142371) 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 3 ways as a sum of consecutive naturals, for example, 47675 + ... + 52508.

It is an arithmetic number, because the mean of its divisors is an integer number (60561228).

Almost surely, 2^242142311 is an apocalyptic number.

242142311 is a deficient number, since it is larger than the sum of its proper divisors (102601).

242142311 is a wasteful number, since it uses less digits than its factorization.

242142311 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 102600.

The product of its digits is 384, while the sum is 20.

The square root of 242142311 is about 15560.9225626246. The cubic root of 242142311 is about 623.2900982973.

Adding to 242142311 its reverse (113241242), we get a palindrome (355383553).

The spelling of 242142311 in words is "two hundred forty-two million, one hundred forty-two thousand, three hundred eleven".