243023144331 has 32 divisors (see below), whose sum is σ = 354861216000. Its totient is φ = 146715770880.

The previous prime is 243023144327. The next prime is 243023144363. The reversal of 243023144331 is 133441320342.

It is a happy number.

It is not a de Polignac number, because 243023144331 - 2² = 243023144327 is a prime.

It is a super-2 number, since 2×243023144331² (a number of 24 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (243023144321) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 9158475 + ... + 9184971.

It is an arithmetic number, because the mean of its divisors is an integer number (11089413000).

Almost surely, 2^243023144331 is an apocalyptic number.

243023144331 is a deficient number, since it is larger than the sum of its proper divisors (111838071669).

243023144331 is a wasteful number, since it uses less digits than its factorization.

243023144331 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 27579.

The product of its (nonzero) digits is 20736, while the sum is 30.

Adding to 243023144331 its reverse (133441320342), we get a palindrome (376464464673).

The spelling of 243023144331 in words is "two hundred forty-three billion, twenty-three million, one hundred forty-four thousand, three hundred thirty-one".