242311231 has 4 divisors (see below), whose sum is σ = 242342752. Its totient is φ = 242279712.

The previous prime is 242311219. The next prime is 242311241. The reversal of 242311231 is 132113242.

It is a happy number.

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 242311231 - 2⁷ = 242311103 is a prime.

It is a super-2 number, since 2×242311231² = 117429465337470722, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 242311199 and 242311208.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (242311241) 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, 4186 + ... + 22408.

It is an arithmetic number, because the mean of its divisors is an integer number (60585688).

Almost surely, 2^242311231 is an apocalyptic number.

242311231 is a deficient number, since it is larger than the sum of its proper divisors (31521).

242311231 is a wasteful number, since it uses less digits than its factorization.

242311231 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 31520.

The product of its digits is 288, while the sum is 19.

The square root of 242311231 is about 15566.3493151092. The cubic root of 242311231 is about 623.4350016391.

Adding to 242311231 its reverse (132113242), we get a palindrome (374424473).

The spelling of 242311231 in words is "two hundred forty-two million, three hundred eleven thousand, two hundred thirty-one".