243005315431 has 8 divisors (see below), whose sum is σ = 254289103200. Its totient is φ = 231781389312.

The previous prime is 243005315419. The next prime is 243005315453. The reversal of 243005315431 is 134513500342.

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 243005315431 - 2²¹ = 243003218279 is a prime.

It is a super-2 number, since 2×243005315431² (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 = 243005315393 and 243005315402.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (243005345431) 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, 14957106 + ... + 14973343.

It is an arithmetic number, because the mean of its divisors is an integer number (31786137900).

Almost surely, 2^243005315431 is an apocalyptic number.

243005315431 is a deficient number, since it is larger than the sum of its proper divisors (11283787769).

243005315431 is a wasteful number, since it uses less digits than its factorization.

243005315431 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 29930825.

The product of its (nonzero) digits is 21600, while the sum is 31.

Adding to 243005315431 its reverse (134513500342), we get a palindrome (377518815773).

The spelling of 243005315431 in words is "two hundred forty-three billion, five million, three hundred fifteen thousand, four hundred thirty-one".