231203143423440 has 240 divisors, whose sum is σ = 806417894880000. Its totient is φ = 59319627967488.

The previous prime is 231203143423433. The next prime is 231203143423457. The reversal of 231203143423440 is 44324341302132.

231203143423440 is a `hidden beast` number, since 2 + 3 + 1 + 203 + 1 + 4 + 3 + 4 + 2 + 3 + 440 = 666.

It is a tau number, because it is divible by the number of its divisors (240).

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a junction number, because it is equal to n+sod(n) for n = 231203143423395 and 231203143423404.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 55903815 + ... + 59896934.

It is an arithmetic number, because the mean of its divisors is an integer number (3360074562000).

Almost surely, 2^{231203143423440} is an apocalyptic number.

231203143423440 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

231203143423440 is an abundant number, since it is smaller than the sum of its proper divisors (575214751456560).

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

231203143423440 is a wasteful number, since it uses less digits than its factorization.

231203143423440 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 115800874 (or 115800865 counting only the distinct ones).

The product of its (nonzero) digits is 165888, while the sum is 36.

Adding to 231203143423440 its reverse (44324341302132), we get a palindrome (275527484725572).

The spelling of 231203143423440 in words is "two hundred thirty-one trillion, two hundred three billion, one hundred forty-three million, four hundred twenty-three thousand, four hundred forty".