243142240331 has 4 divisors (see below), whose sum is σ = 243143266464. Its totient is φ = 243141214200.

The previous prime is 243142240321. The next prime is 243142240381. The reversal of 243142240331 is 133042241342.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is not a de Polignac number, because 243142240331 - 2³⁴ = 225962371147 is a prime.

It is a super-2 number, since 2×243142240331² (a number of 24 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 243142240294 and 243142240303.

It is not an unprimeable number, because it can be changed into a prime (243142240301) 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, 43901 + ... + 698721.

It is an arithmetic number, because the mean of its divisors is an integer number (60785816616).

Almost surely, 2^243142240331 is an apocalyptic number.

243142240331 is a deficient number, since it is larger than the sum of its proper divisors (1026133).

243142240331 is an equidigital number, since it uses as much as digits as its factorization.

243142240331 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1026132.

The product of its (nonzero) digits is 13824, while the sum is 29.

Adding to 243142240331 its reverse (133042241342), we get a palindrome (376184481673).

The spelling of 243142240331 in words is "two hundred forty-three billion, one hundred forty-two million, two hundred forty thousand, three hundred thirty-one".