243142131 has 8 divisors (see below), whose sum is σ = 338284800. Its totient is φ = 155047112.

The previous prime is 243142103. The next prime is 243142169. The reversal of 243142131 is 131241342.

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 243142131 - 2¹³ = 243133939 is a prime.

It is a super-2 number, since 2×243142131² = 118236191734442322, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 243142098 and 243142107.

It is not an unprimeable number, because it can be changed into a prime (243142181) 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, 1761831 + ... + 1761968.

It is an arithmetic number, because the mean of its divisors is an integer number (42285600).

Almost surely, 2^243142131 is an apocalyptic number.

243142131 is a deficient number, since it is larger than the sum of its proper divisors (95142669).

243142131 is a wasteful number, since it uses less digits than its factorization.

243142131 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3523825.

The product of its digits is 576, while the sum is 21.

The square root of 243142131 is about 15593.0154556455. The cubic root of 243142131 is about 624.1467875623.

Adding to 243142131 its reverse (131241342), we get a palindrome (374383473).

The spelling of 243142131 in words is "two hundred forty-three million, one hundred forty-two thousand, one hundred thirty-one".