231243144144 has 40 divisors (see below), whose sum is σ = 597443032032. Its totient is φ = 77072672640.

The previous prime is 231243144127. The next prime is 231243144149. The reversal of 231243144144 is 441441342132.

It is a happy number.

It is a super-2 number, since 2×231243144144² (a number of 24 digits) contains 22 as substring.

It is a nude number because it is divisible by every one of its digits.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (231243144149) 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, 192762 + ... + 706854.

Almost surely, 2^231243144144 is an apocalyptic number.

231243144144 is a gapful number since it is divisible by the number (24) formed by its first and last digit.

It is an amenable number.

231243144144 is an abundant number, since it is smaller than the sum of its proper divisors (366199887888).

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

231243144144 is a wasteful number, since it uses less digits than its factorization.

231243144144 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 523475 (or 523469 counting only the distinct ones).

The product of its digits is 36864, while the sum is 33.

Adding to 231243144144 its reverse (441441342132), we get a palindrome (672684486276).

The spelling of 231243144144 in words is "two hundred thirty-one billion, two hundred forty-three million, one hundred forty-four thousand, one hundred forty-four".