233131405240021 has 8 divisors (see below), whose sum is σ = 234527800187520. Its totient is φ = 231735015037008.

The previous prime is 233131405240009. The next prime is 233131405240073. The reversal of 233131405240021 is 120042504131332.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 233131405240021 - 2⁷ = 233131405239893 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (233131405240121) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 180157335 + ... + 181446763.

It is an arithmetic number, because the mean of its divisors is an integer number (29315975023440).

Almost surely, 2^{233131405240021} is an apocalyptic number.

It is an amenable number.

233131405240021 is a deficient number, since it is larger than the sum of its proper divisors (1396394947499).

233131405240021 is a wasteful number, since it uses less digits than its factorization.

233131405240021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2372243.

The product of its (nonzero) digits is 17280, while the sum is 31.

Adding to 233131405240021 its reverse (120042504131332), we get a palindrome (353173909371353).

The spelling of 233131405240021 in words is "two hundred thirty-three trillion, one hundred thirty-one billion, four hundred five million, two hundred forty thousand, twenty-one".