243431230340 has 24 divisors (see below), whose sum is σ = 511880920152. Its totient is φ = 97243856640.

The previous prime is 243431230333. The next prime is 243431230369. The reversal of 243431230340 is 43032134342.

It can be written as a sum of positive squares in 4 ways, for example, as 4331745856 + 239099484484 = 65816^2 + 488978^2 .

It is a super-2 number, since 2×243431230340² (a number of 24 digits) contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 8024201 + ... + 8054480.

It is an arithmetic number, because the mean of its divisors is an integer number (21328371673).

Almost surely, 2^243431230340 is an apocalyptic number.

243431230340 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

243431230340 is an abundant number, since it is smaller than the sum of its proper divisors (268449689812).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

243431230340 is a wasteful number, since it uses less digits than its factorization.

243431230340 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16079447 (or 16079445 counting only the distinct ones).

The product of its (nonzero) digits is 20736, while the sum is 29.

Adding to 243431230340 its reverse (43032134342), we get a palindrome (286463364682).

The spelling of 243431230340 in words is "two hundred forty-three billion, four hundred thirty-one million, two hundred thirty thousand, three hundred forty".