233828145368221 has 4 divisors (see below), whose sum is σ = 233831240332732. Its totient is φ = 233825050403712.

The previous prime is 233828145368219. The next prime is 233828145368231. The reversal of 233828145368221 is 122863541828332.

233828145368221 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 197157684451225 + 36670460916996 = 14041285^2 + 6055614^2 .

It is a cyclic number.

It is not a de Polignac number, because 233828145368221 - 2¹ = 233828145368219 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 (233828145368231) 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, 1547368926 + ... + 1547520031.

It is an arithmetic number, because the mean of its divisors is an integer number (58457810083183).

Almost surely, 2^{233828145368221} is an apocalyptic number.

It is an amenable number.

233828145368221 is a deficient number, since it is larger than the sum of its proper divisors (3094964511).

233828145368221 is an equidigital number, since it uses as much as digits as its factorization.

233828145368221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3094964510.

The product of its digits is 26542080, while the sum is 58.

The spelling of 233828145368221 in words is "two hundred thirty-three trillion, eight hundred twenty-eight billion, one hundred forty-five million, three hundred sixty-eight thousand, two hundred twenty-one".