242543023 has 4 divisors (see below), whose sum is σ = 243692728. Its totient is φ = 241393320.

The previous prime is 242543009. The next prime is 242543033. The reversal of 242543023 is 320345242.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-242543023 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 (242543033) 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, 574536 + ... + 574957.

It is an arithmetic number, because the mean of its divisors is an integer number (60923182).

Almost surely, 2^242543023 is an apocalyptic number.

242543023 is a deficient number, since it is larger than the sum of its proper divisors (1149705).

242543023 is a wasteful number, since it uses less digits than its factorization.

242543023 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1149704.

The product of its (nonzero) digits is 5760, while the sum is 25.

The square root of 242543023 is about 15573.7928264119. The cubic root of 242543023 is about 623.6337284195.

Adding to 242543023 its reverse (320345242), we get a palindrome (562888265).

The spelling of 242543023 in words is "two hundred forty-two million, five hundred forty-three thousand, twenty-three".