243143031 has 8 divisors (see below), whose sum is σ = 324745344. Its totient is φ = 161818040.

The previous prime is 243142987. The next prime is 243143053. The reversal of 243143031 is 130341342.

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 243143031 - 2⁶ = 243142967 is a prime.

It is a super-2 number, since 2×243143031² = 118237067047733922, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 243142989 and 243143007.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (243143081) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 67275 + ... + 70796.

It is an arithmetic number, because the mean of its divisors is an integer number (40593168).

Almost surely, 2^243143031 is an apocalyptic number.

243143031 is a deficient number, since it is larger than the sum of its proper divisors (81602313).

243143031 is a wasteful number, since it uses less digits than its factorization.

243143031 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 138661.

The product of its (nonzero) digits is 864, while the sum is 21.

The square root of 243143031 is about 15593.0443146937. The cubic root of 243143031 is about 624.1475576625.

Adding to 243143031 its reverse (130341342), we get a palindrome (373484373).

The spelling of 243143031 in words is "two hundred forty-three million, one hundred forty-three thousand, thirty-one".