243204143431 has 16 divisors (see below), whose sum is σ = 248459365440. Its totient is φ = 237991576320.

The previous prime is 243204143407. The next prime is 243204143461. The reversal of 243204143431 is 134341402342.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-243204143431 is a prime.

It is a super-2 number, since 2×243204143431² (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 = 243204143393 and 243204143402.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (243204143401) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 18740461 + ... + 18753433.

It is an arithmetic number, because the mean of its divisors is an integer number (15528710340).

Almost surely, 2^243204143431 is an apocalyptic number.

243204143431 is a deficient number, since it is larger than the sum of its proper divisors (5255222009).

243204143431 is a wasteful number, since it uses less digits than its factorization.

243204143431 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14586.

The product of its (nonzero) digits is 27648, while the sum is 31.

Adding to 243204143431 its reverse (134341402342), we get a palindrome (377545545773).

The spelling of 243204143431 in words is "two hundred forty-three billion, two hundred four million, one hundred forty-three thousand, four hundred thirty-one".