233421005 has 4 divisors (see below), whose sum is σ = 280105212. Its totient is φ = 186736800.

The previous prime is 233420977. The next prime is 233421007. The reversal of 233421005 is 500124332.

It is a happy number.

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 83137924 + 150283081 = 9118^2 + 12259^2 .

It is not a de Polignac number, because 233421005 - 2¹⁶ = 233355469 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 (233421007) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 23342096 + ... + 23342105.

It is an arithmetic number, because the mean of its divisors is an integer number (70026303).

Almost surely, 2^233421005 is an apocalyptic number.

It is an amenable number.

233421005 is a deficient number, since it is larger than the sum of its proper divisors (46684207).

233421005 is an equidigital number, since it uses as much as digits as its factorization.

233421005 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 46684206.

The product of its (nonzero) digits is 720, while the sum is 20.

The square root of 233421005 is about 15278.1217759252. The cubic root of 233421005 is about 615.7153462534.

Adding to 233421005 its reverse (500124332), we get a palindrome (733545337).

The spelling of 233421005 in words is "two hundred thirty-three million, four hundred twenty-one thousand, five".