233443404403421 has 4 divisors (see below), whose sum is σ = 233443566043932. Its totient is φ = 233443242762912.

The previous prime is 233443404403387. The next prime is 233443404403507. The reversal of 233443404403421 is 124304404344332.

233443404403421 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 114786260407225 + 118657143996196 = 10713835^2 + 10892986^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-233443404403421 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (233443404403621) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 78634226 + ... + 81548931.

It is an arithmetic number, because the mean of its divisors is an integer number (58360891510983).

Almost surely, 2^{233443404403421} is an apocalyptic number.

It is an amenable number.

233443404403421 is a deficient number, since it is larger than the sum of its proper divisors (161640511).

233443404403421 is a wasteful number, since it uses less digits than its factorization.

233443404403421 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 161640510.

The product of its (nonzero) digits is 1327104, while the sum is 41.

Adding to 233443404403421 its reverse (124304404344332), we get a palindrome (357747808747753).

The spelling of 233443404403421 in words is "two hundred thirty-three trillion, four hundred forty-three billion, four hundred four million, four hundred three thousand, four hundred twenty-one".