242440031 has 4 divisors (see below), whose sum is σ = 244585632. Its totient is φ = 240294432.

The previous prime is 242439991. The next prime is 242440039. The reversal of 242440031 is 130044242.

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 242440031 - 2¹⁰ = 242439007 is a prime.

It is a super-2 number, since 2×242440031² = 117554337262561922, 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 = 242439985 and 242440012.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (242440039) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1072631 + ... + 1072856.

It is an arithmetic number, because the mean of its divisors is an integer number (61146408).

Almost surely, 2^242440031 is an apocalyptic number.

242440031 is a deficient number, since it is larger than the sum of its proper divisors (2145601).

242440031 is a wasteful number, since it uses less digits than its factorization.

242440031 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2145600.

The product of its (nonzero) digits is 768, while the sum is 20.

The square root of 242440031 is about 15570.4858947947. The cubic root of 242440031 is about 623.5454439059.

Adding to 242440031 its reverse (130044242), we get a palindrome (372484273).

The spelling of 242440031 in words is "two hundred forty-two million, four hundred forty thousand, thirty-one".