243013143 has 4 divisors (see below), whose sum is σ = 324017528. Its totient is φ = 162008760.

The previous prime is 243013139. The next prime is 243013159. The reversal of 243013143 is 341310342.

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

It is not a de Polignac number, because 243013143 - 2² = 243013139 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 (243013163) 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, 40502188 + ... + 40502193.

It is an arithmetic number, because the mean of its divisors is an integer number (81004382).

Almost surely, 2^243013143 is an apocalyptic number.

243013143 is a deficient number, since it is larger than the sum of its proper divisors (81004385).

243013143 is an equidigital number, since it uses as much as digits as its factorization.

243013143 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 81004384.

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

The square root of 243013143 is about 15588.8788243414. The cubic root of 243013143 is about 624.0363971414.

Adding to 243013143 its reverse (341310342), we get a palindrome (584323485).

The spelling of 243013143 in words is "two hundred forty-three million, thirteen thousand, one hundred forty-three".