233230421 has 2 divisors, whose sum is σ = 233230422. Its totient is φ = 233230420.

The previous prime is 233230397. The next prime is 233230423. The reversal of 233230421 is 124032332.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 162435025 + 70795396 = 12745^2 + 8414^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-233230421 is a prime.

Together with 233230423, it forms a pair of twin primes.

It is a Chen prime.

It is a junction number, because it is equal to n+sod(n) for n = 233230393 and 233230402.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (233230423) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 116615210 + 116615211.

It is an arithmetic number, because the mean of its divisors is an integer number (116615211).

Almost surely, 2^233230421 is an apocalyptic number.

It is an amenable number.

233230421 is a deficient number, since it is larger than the sum of its proper divisors (1).

233230421 is an equidigital number, since it uses as much as digits as its factorization.

233230421 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 864, while the sum is 20.

The square root of 233230421 is about 15271.8833481663. The cubic root of 233230421 is about 615.5477271698.

Adding to 233230421 its reverse (124032332), we get a palindrome (357262753).

The spelling of 233230421 in words is "two hundred thirty-three million, two hundred thirty thousand, four hundred twenty-one".