231200133203440 has 40 divisors (see below), whose sum is σ = 537575066587440. Its totient is φ = 92474073601536.

The previous prime is 231200133203317. The next prime is 231200133203513. The reversal of 231200133203440 is 44302331002132.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (40).

It is a junction number, because it is equal to n+sod(n) for n = 231200133203399 and 231200133203408.

It is a congruent number.

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, 92187405 + ... + 94662124.

It is an arithmetic number, because the mean of its divisors is an integer number (13439376664686).

Almost surely, 2^{231200133203440} is an apocalyptic number.

231200133203440 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

231200133203440 is an abundant number, since it is smaller than the sum of its proper divisors (306374933384000).

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

231200133203440 is a wasteful number, since it uses less digits than its factorization.

231200133203440 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 186865009 (or 186865003 counting only the distinct ones).

The product of its (nonzero) digits is 10368, while the sum is 28.

Adding to 231200133203440 its reverse (44302331002132), we get a palindrome (275502464205572).

The spelling of 231200133203440 in words is "two hundred thirty-one trillion, two hundred billion, one hundred thirty-three million, two hundred three thousand, four hundred forty".