242311 has 4 divisors (see below), whose sum is σ = 243432. Its totient is φ = 241192.

The previous prime is 242309. The next prime is 242329. The reversal of 242311 is 113242.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is not a de Polignac number, because 242311 - 2¹ = 242309 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 242291 and 242300.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (242371) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 121 + ... + 706.

It is an arithmetic number, because the mean of its divisors is an integer number (60858).

2²⁴²³¹¹ is an apocalyptic number.

242311 is a deficient number, since it is larger than the sum of its proper divisors (1121).

242311 is an equidigital number, since it uses as much as digits as its factorization.

242311 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1120.

The product of its digits is 48, while the sum is 13.

The square root of 242311 is about 492.2509522591. The cubic root of 242311 is about 62.3434803528.

Adding to 242311 its reverse (113242), we get a palindrome (355553).

The spelling of 242311 in words is "two hundred forty-two thousand, three hundred eleven", and thus it is an iban number.