242042531 has 8 divisors (see below), whose sum is σ = 245941200. Its totient is φ = 238170240.

The previous prime is 242042509. The next prime is 242042551. The reversal of 242042531 is 135240242.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 242042531 - 2¹⁰ = 242041507 is a prime.

It is a super-2 number, since 2×242042531² = 117169173625771922, 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 = 242042497 and 242042506.

It is not an unprimeable number, because it can be changed into a prime (242042551) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 12335 + ... + 25223.

It is an arithmetic number, because the mean of its divisors is an integer number (30742650).

Almost surely, 2^242042531 is an apocalyptic number.

242042531 is a deficient number, since it is larger than the sum of its proper divisors (3898669).

242042531 is a wasteful number, since it uses less digits than its factorization.

242042531 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13189.

The product of its (nonzero) digits is 1920, while the sum is 23.

The square root of 242042531 is about 15557.7161241617. The cubic root of 242042531 is about 623.2044731262.

Adding to 242042531 its reverse (135240242), we get a palindrome (377282773).

The spelling of 242042531 in words is "two hundred forty-two million, forty-two thousand, five hundred thirty-one".