233020421 has 2 divisors, whose sum is σ = 233020422. Its totient is φ = 233020420.

The previous prime is 233020379. The next prime is 233020457. The reversal of 233020421 is 124020332.

233020421 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 233020225 + 196 = 15265^2 + 14^2 .

It is a cyclic number.

It is not a de Polignac number, because 233020421 - 2⁶ = 233020357 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 233020421.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (233020621) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 116510210 + 116510211.

It is an arithmetic number, because the mean of its divisors is an integer number (116510211).

Almost surely, 2^233020421 is an apocalyptic number.

It is an amenable number.

233020421 is a deficient number, since it is larger than the sum of its proper divisors (1).

233020421 is an equidigital number, since it uses as much as digits as its factorization.

233020421 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 288, while the sum is 17.

The square root of 233020421 is about 15265.0064199135. The cubic root of 233020421 is about 615.3629258930.

Adding to 233020421 its reverse (124020332), we get a palindrome (357040753).

The spelling of 233020421 in words is "two hundred thirty-three million, twenty thousand, four hundred twenty-one".